TeX Quellcode:
\begin{array}{crclllcc} \text{I} & 5y-\dfrac{1}{2}z &=& 10 &\vert& -5y \cr \cr \text{II} & 5y-\dfrac{1}{2}z &=& -14 &\vert& -5y \cr \cr \cr \text{I} & -\dfrac{1}{2}z &=& 10-5y \cr \cr \text{II} & -\dfrac{1}{2}z &=& -14-5y \cr \cr \cr \text{I=II} & 10-5y &=& -14-5y &\vert& +5y \cr & 10 &=& -14 \cr \cr \cr & \mathbb{L} &=& \emptyset \end{array}