TeX Quellcode:

\begin{array}{crclllcc} \text{I} & 3x+2y &=& 9 \cr \text{II} & 7x+y &=& 32 & \vert -7x \cr \cr \text{I} & 3x+2y &=& 9 \cr \text{II} & y &=& 32-7x \cr \cr \text{II in I} & 3x+2 \cdot (32-7x) &=& 9 \cr & 3x+64-14x &=& 9 &\vert -64 \cr & -11x &=& -55 & \Rightarrow x = 5 \cr \cr x=5 \text{ in II} & y &=& 32-7 \cdot 5 & \Rightarrow y = -3 \cr \cr & \mathbb{L} &=& \{\left(5; -3 \right) \} \end{array}