Aligning Systems of Equations

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

enter image description here

I want the Greek letters and the math symbols to be aligned, with appropriate spacing in between coefficients. I've tried using begin{aligned} end{aligned} and begin{array}{ll} end{array}{ll} as well, but they also don't provide the desired outcome.

Would anyone be kind enough to help me out? Thank you.

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

1

You can try the package systeme: ctan.org/pkg/systeme .

– projetmbc
Feb 21 at 15:20

See also tex.stackexchange.com/questions/35174/…

– Steven B. Segletes
Feb 21 at 16:25

See Why is [ … ] preferable to $$?

– Werner
Feb 21 at 16:33

add a comment |

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

enter image description here

Would anyone be kind enough to help me out? Thank you.

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

1

You can try the package systeme: ctan.org/pkg/systeme .

– projetmbc
Feb 21 at 15:20

See also tex.stackexchange.com/questions/35174/…

– Steven B. Segletes
Feb 21 at 16:25

See Why is [ … ] preferable to $$?

– Werner
Feb 21 at 16:33

add a comment |

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

enter image description here

Would anyone be kind enough to help me out? Thank you.

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

I'm trying to line up the variables of systems of equations. The following code:

$$left\{

begin{aligned}

&alpha + 2&beta + &gamma & = 0 \\

3&alpha + 7&beta + 5&gamma & = 1

end{aligned}

right.$$

produces the following image:

enter image description here

Would anyone be kind enough to help me out? Thank you.

math-mode align

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

edited Feb 21 at 15:14

JouleV

7,89222053

edited Feb 21 at 15:14

JouleV

7,89222053

edited Feb 21 at 15:14

JouleV

7,89222053

asked Feb 21 at 15:12

Seankala

1234

asked Feb 21 at 15:12

Seankala

1234

asked Feb 21 at 15:12

Seankala

1234

1

You can try the package systeme: ctan.org/pkg/systeme .

– projetmbc
Feb 21 at 15:20

See also tex.stackexchange.com/questions/35174/…

– Steven B. Segletes
Feb 21 at 16:25

See Why is [ … ] preferable to $$?

– Werner
Feb 21 at 16:33

add a comment |

1

You can try the package systeme: ctan.org/pkg/systeme .

– projetmbc
Feb 21 at 15:20

See also tex.stackexchange.com/questions/35174/…

– Steven B. Segletes
Feb 21 at 16:25

See Why is [ … ] preferable to $$?

– Werner
Feb 21 at 16:33

You can try the package systeme: ctan.org/pkg/systeme .

– projetmbc
Feb 21 at 15:20

See also tex.stackexchange.com/questions/35174/…

– Steven B. Segletes
Feb 21 at 16:25

See Why is [ … ] preferable to $$?

– Werner
Feb 21 at 16:33

add a comment |

3 Answers
3

active

oldest

votes

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

enter image description here

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

1

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

1

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

1

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

|
show 4 more comments

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

enter image description here

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

add a comment |

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

enter image description here

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

enter image description here

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

1

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

1

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

1

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

|
show 4 more comments

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

enter image description here

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

1

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

1

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

1

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

|
show 4 more comments

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

enter image description here

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

First of all, do not use $$ ... $$, which is plain TeX, use the LaTeX construct [ ... ].

Second, 4 alignment points require 7 ampersands, not 4: each new column of alignment has to be introduced by an ampersand. So n alignment points require 2n–1 ampersands.

Last: use alignat (or alignedat) to have full control on the spacing between columns of alignment.

Here is a possible code:

[ left{

begin{alignedat}{4}

&alpha &{} + 2&beta + {} & &gamma & & = 0 \\

3&alpha &{} + 7&beta + 5 & &gamma & & = 1

end{alignedat}

However, using the systeme package makes it simpler to type:

[ systeme[alphabetagamma]{alpha + 2beta +gamma = 0, 3alpha + 7beta + 5gamma = 1} ]

enter image description here

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

edited Feb 21 at 17:18

answered Feb 21 at 15:23

Bernard

174k776206

answered Feb 21 at 15:23

Bernard

174k776206

answered Feb 21 at 15:23

Bernard

174k776206

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

1

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

1

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

1

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

|
show 4 more comments

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

1

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

1

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

1

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

I had no idea that $ was plain TeX, thanks! Unfortunately it seems that for the Github Markdown I'm trying to edit, [ doesn't seem to work... But begin{alignedat}{4} end{alignedat} works perfectly!

– Seankala
Feb 21 at 15:36

I've updated with a simpler way to type (the systeme command from the homonymous package).

– Bernard
Feb 21 at 15:38

In your first method, the spacing around the = is not correct.

– Steven B. Segletes
Feb 21 at 15:42

amsldoc (amsmath documentation) and systeme. Feel free to ask any questions.

– Bernard
Feb 21 at 16:08

The empty curly braces are there because $+$ (or $-$) are binary operators with a special spacing w.r.t. the elements on the right and on the left. This can be destroyed by an ampersand, and to compensate, one has to add an empty argument, namely {}. For the number of &, maybe I was not clear enough: each column of alignment, but the first, has to be introduced by an &. Inside this column, the alignment point is specified with another &. Check on my code, you should see this rule is respected. Is this clear?

– Bernard
Feb 21 at 16:26

|
show 4 more comments

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

enter image description here

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

add a comment |

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

enter image description here

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

add a comment |

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

enter image description here

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

Something like this?

documentclass{article}

usepackage{tabstackengine}

begin{document}

[

left{

setstackgap{L}{18pt}

Matrixstack[r]{

alpha  +& 2beta +&  gamma =& 0 \

3alpha +& 7beta +& 5gamma =& 1

}

right.

]

end{document}

enter image description here

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

answered Feb 21 at 15:23

Steven B. Segletes

159k9204412

add a comment |

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

enter image description here

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

add a comment |

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

enter image description here

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

add a comment |

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

enter image description here

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

Here's a solution that requires only the basic array package. The following code also sets up a custom array-like environment.

enter image description here

documentclass{article}

usepackage{array} % for "newcolumntype" macro

newcolumntype{C}{>{{}}c<{{}}}

%% set up a little custom enrironment:

newenvironment{myarray}[1]{%

   setlengtharraycolsep{0pt}

   left{ begin{array}{#1}}{%

   end{array} right.}



begin{document}

[

begin{myarray}{rCrCrCl}

 alpha &+& 2beta &+&  gamma &=& 0 \

3alpha &+& 7beta &+& 5gamma &=& 1

end{myarray}

]

end{document}

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

edited Feb 21 at 16:13

answered Feb 21 at 15:44

Mico

284k31388778

answered Feb 21 at 15:44

Mico

284k31388778

answered Feb 21 at 15:44

Mico

284k31388778

add a comment |

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