% inv op worksheet template
\documentclass[varwidth]{standalone}
\usepackage{amsmath}
\usepackage[normalem]{ulem} % [normalem] prevents the package from changing the default behavior of `\\emph` to underline.
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{align*}

\begin{document}
    \begin{varwidth}{0.25\paperwidth}
    \begin{align*}
    \frac{x}{5} &= 2\\
    \frac{x}{5} \times5 &= 2 \times5\\
    x &= 10\\
\end{align*}
\end{varwidth}

\end{document}