%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 8-2-22 on page 480.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexamargin}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{231.0pt}

\StartShownPreambleCommands
\usepackage{amsmath}
\StopShownPreambleCommands
\begin{document}
We now have the following:
\[  X = a \qquad  a = c \]
and thus we have
\begin{equation}  X = c \end{equation}
And now we don't get much space
around the display!
\end{document}
