%% 
%%  Example 02-13-2 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{328.62788pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{amsmath}
%StopShownPreambleCommands
\begin{document}
\begin{flalign*}
             && 12(x-1) + 20(y-3) + 14(z-2) & = 0 &&\\
  \text{and} &&               6x + 10y + 7z & = 0  &&
\end{flalign*}
%
\begin{align}
            && 12(x-1) + 20(y-3) + 14(z-2) & = 0\\
  \text{and} &&               6x + 10y + 7z & = 0
\end{align}
\end{document}
