Split long equations into multiple lines in LaTeX

This article presents two ways to split long equations into multiple lines with and without alignment.

1. Split equations

Use multline or split provided by amsmath package.

  • Use multline to split equations without alignment (first line left, last line right)
  • Use split to split equations with alignment

Here are examples:

illustrated-examples-to-split-equations
Fig. 1: Illustrated examples to split equations.

For more info, refer to User’s Guide for the amsmath Package.

2. The source code

The corresponding source code is as follows:

(i).Use equation:
\begin{equation}
1+2+3+4+8x+7=1+2+3+4+4x+35 \\
\Rightarrow x=7
\end{equation}

(ii).Use \emph{multline} to split equations without alignment:
\begin{multline}
1+2+3+4+8x+7=1+2+3+4+4x+35 \\
\Rightarrow x=7
\end{multline}

(iii).Use \emph{split} to split equations with alignment
\begin{equation}
\begin{split}
1+2+3+4+8x+7 & =1+2+3+4+4x+35 \\
& \Rightarrow x=7
\end{split}
\end{equation}

References:
[1] StackExchang TeX-LaTeX: How can I split an equation over two lines

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