%% 
%%  Example 07-03-2 
%%  Copyright (C) 2017 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\setlength\parindent{0pt}
\usepackage[T1]{fontenc}
%StartShownPreambleCommands
\usepackage{amsmath,bigdelim}
%StopShownPreambleCommands
\begin{document}
\begin{tabular}{rc}
\ldelim\{{2}{2.75cm}[some text here] &
 \parbox{\dimexpr\linewidth-3cm-4\tabcolsep}{%
   \vspace*{1ex}
   \begin{flalign}
     x & = 2\quad\text{if }y >2 &\\
     x & = 3\quad\text{if }y \le 2&
   \end{flalign}}
\end{tabular}
\end{document}
