%% %% Ein Beispiel der DANTE-Edition %% %% 2. Auflage %% %% Beispiel 09-08-41 auf Seite 466. %% %% Copyright (C) 2016 Herbert Voss %% %% 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. %% %% %% ==== % Show page(s) 1 %% %% \documentclass[]{exaarticle} \pagestyle{empty} \setlength\textwidth{193.16928pt} \AtBeginDocument{\setlength\parindent{0pt}} \setcounter{equation}{99} \renewcommand\theequation{9.\arabic{equation}} %StartShownPreambleCommands \usepackage{mathtools} \newcounter{linecnt} \renewcommand\thelinecnt{(\alph{linecnt})} \newcommand\stepline{% \stepcounter{linecnt}\thelinecnt} \newgathered{agathered} {\llap{\stepline}\quad\hfil}{\hfil} {\setcounter{linecnt}{0}} %StopShownPreambleCommands \begin{document} \begin{align}\begin{agathered} i_{11}+i_{21}=0.25\\ i_{21}=\frac{1}{3}i_{11}\\ i_{31}=0.33i_{22}+i_{11}-0.1i_{21} \end{agathered}\\[7pt] \begin{agathered} f(x)=3x+4\\ g(x)=\sqrt{x^2-1} \end{agathered}\end{align} \end{document}