%% 
%%  Example 01-11-6 
%%  Copyright (C) 2017 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}

%StartShownPreambleCommands
\usepackage{setspace}
\newcommand*\Array[2][1]{\setstretch{#1}\array{#2}}
\let\endArray\endarray
%StopShownPreambleCommands
\begin{document}
\[ \begin{Array}[2]{cc}
  a =& b\\ a =& b\\ a =& b
  \end{Array} \]
%
text
$\begin{Array}{cc}
  a =& b\\ a =& b\\ a =& b
\end{Array}$ text
\end{document}
