TeX Quellcode:

\begin{array}{crclllcc} \text{I} & 2x+6y &=& 14 & \vert & -2x \cr \text{II} & x+6y &=& 13& \vert & -x \cr \cr \text{I} & 6y &=& -2x+14 & \vert & : 6 \cr \text{II} & 6y &=& -x+13 & \vert & : 6 \cr \cr \cr \text{I} & y &=& -\dfrac{1}{3}x+\dfrac{7}{3} \cr \cr \text{II} & y &=& -\dfrac{1}{6}x+\dfrac{13}{6} \end{array}