1

I see many example about aligning a set of equations to the left, but none them works for me. The set looks like

\usepackage{amsmath}
....
\begin{equation}
\begin{flalign}
A_{l-side} &= 1+2 \\
B_{both-side} &= 3+4+5+6  \\

\end{flalign}
\end{equation}

Then I get this error

 Runaway argument?
 A_{l-side} &= 1+2 \\ B_{both-side} &= 3+4+5+6 \\
 ! Paragraph ended before \flalign was complete.
 <to be read again>
               \par
 l.72

 ?

Who can interpret the error?!

1
  • 1
    The blank line inside of equation environments is not permitted. Jul 31, 2014 at 10:06

2 Answers 2

2

Maybe you are looking for something like that

enter image description here

Code:

\documentclass{article}
\usepackage{amsmath}

\usepackage{blindtext}% dummy text

\begin{document}
\blindtext
\begin{flalign}
   A_{l-side} &= 1+2&\\
   B_{both-side} &= 3+4+5+6
\end{flalign}
\blindtext
\end{document}

I have only added an & at the end of the first line. Note that there should be no blank line inside the math environment.


Or may be that is what you want

enter image description here

Code

\documentclass{article}
\usepackage{amsmath}

\usepackage{blindtext}% dummy text

\begin{document}
\blindtext
\begin{flalign}
   &A_{l-side} = 1+2&\\
   &B_{both-side} = 3+4+5+6
\end{flalign}
\blindtext
\end{document}

Or

enter image description here

Code:

\documentclass[fleqn]{article}
\usepackage{amsmath}
\setlength\mathindent{0pt}
\usepackage{blindtext}% dummy text
\begin{document}
\blindtext
\begin{alignat}{2}
   &A_{l-side}&& = 1+2\\
   &B_{both-side} &&= 3+4+5+6
\end{alignat}
\blindtext
\end{document}
3
  • But the equations are not left aligned. Are they?
    – mahmood
    Jul 31, 2014 at 10:53
  • I have added another suggestion. But I am not sure if I unterstand what you want.
    – esdd
    Jul 31, 2014 at 11:47
  • Originally I was looking for the second case. But now I see that third case is the best. Thanks
    – mahmood
    Jul 31, 2014 at 12:56
1

(1) do not use equation around it, (2) typo, you have two \begin{flalign}

3
  • post has been updated
    – mahmood
    Jul 31, 2014 at 9:58
  • Removing \begin{euqation} and \end{equation} has o effect also
    – mahmood
    Jul 31, 2014 at 10:00
  • 1
    Never use blank lines inside math envs. Not supported.
    – daleif
    Jul 31, 2014 at 10:39

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