TeX Quellcode:

\begin{array}{crclllcc} \text{I} & h+s &=& 37 & \vert \cdot (-2) \cr \text{II} & 2h+4s &=& 90 \cr \cr \text{I} & -2h-2s &=& -74 \cr \text{II} & 2h+4s &=& 90 \cr \cr \text{I} & -2h-2s &=& -74 \cr \text{I+II} & 2s &=& 16 & \Rightarrow s = 8 \cr \cr s = 8 \text{ in I} & h+8 &=& 37 & \Rightarrow h = 29 \end{array}