Math & Science ⇒ How to align equation when it includes texts?

[yaozhao]

Code: Select all

10. a. The inverse supply is
\[P =\frac{Q^S}{10}\]
whereas the inverse demand is
\[P = 20 – \frac{1}{5}Q^D\]
The graph is shown below.

I want that two = align. How to do this? I know how to do when there are no texts (by using \begin{align*} and &).

[Stefan Kottwitz]

Hi,

you can use \intertext:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\noindent
The inverse supply is
\begin{align*}
      P &=\frac{Q^S}{10} \\
  \intertext{whereas the inverse demand is}
      P &= 20 – \frac{1}{5}Q^D
\end{align*}
The graph is shown below.
\end{document}

Stefan