TeX Quellcode:

\begin{array}{crclllcc} \text{I} & 2x+6y &=& 14 \cr \text{II} & x+6y &=& 13 & \vert & \cdot (-2) \cr \cr \text{I} & 2x+6y &=& 14 \cr \text{II} & -2x-12y &=& -26 \cr \cr \text{I} & 2x+6y &=& 14 \cr \text{I+II} & 0x-6y &=& -12 & \vert & :(-6) & \Rightarrow & y = 2 \cr \cr y=2 \text{ in I} & 2x+6 \cdot 2 &=& 14 \cr & 2x+12 &=& 14 & \vert &-12 \cr & 2x &=& 2 & \vert & :2 & \Rightarrow & x = 1 \cr \cr & \mathbb{L} &=& \{\left(1; 2\right)\} \end{array}