Add a brace on the left side of a group

Question

I can't figure out how to place the brace on the opposite side, that is on the left of the group of equations, when following the answer in this link:

How to put a brace on the right, not left, to group cases?

What should be changed in the solution?

Answer 1

Use cases. Load amsmath package in the preamble as usual.

\documentclass[10pt]{article}

\usepackage{amsmath}

\begin{document}
\begin{align*}
\begin{cases}
a&=bbb\\
c&=ddddddd\\
e&=ffffffffff
\end{cases}
\end{align*}
\end{document}

Also, you can use equation* instead of align*.

Here is the output.