TeX Quellcode:
\begin{array}{crclllcc} \text{I} & 3x-4y &=& -24 & \vert +4y \cr \text{II} & 3x+3y &=& 18 & \vert -3y \cr \cr \text{I} & 3x &=& -24+4y \cr \text{II} & 3x &=& 18-3y \cr \cr \text{I = II} & -24+4y &=& 18-3y &\vert +24+3y \cr & 4y+3y &=& 18+24 \cr & 7y &=& 42 & \Rightarrow y = 6 \cr \cr y=6 \text{ in II} & 3x &=& 18-3 \cdot 6 \cr & 3x &=& 0 & \Rightarrow x = 0 \cr \cr & \mathbb{L} &=& \{\left(0; 6\right)\} \end{array}