Aligned equations

Question

I want to have aligned equations going vertically down a page. How do I get this style?

Instead of the following:

\[
x_1 + x_2 + x_3


x_2 + x_4 + x_5
\]

What how should I do this?

Answer 1

To use the align environment, be sure to load the amsmath package in your document's preamble. In the example code below, the "equations" are aligned on the first character (as you didn't provide information on what other point they should be aligned).

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*} % align* produces unnumbered equations
& x_1 + x_2 + x_3\\
& x_2 + x_4 + x_5
\end{align*}
\end{document}