Code: Select all
\documentclass[a4paper,12pt]{report}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{gensymb}
\usepackage{array}
\begin{align*}
a long equation&=a long equation \\
more equation&=more equation \\
\text{things I want to say to make life easier to understand equation} \\
a long equation&=a long equation \\
more equation&=more equation \\
\text{other stuff I want to say} \\
more equation&=more equation \\
\end{align*}