TeX Quellcode:

\begin{array}{rclcl rclcl}\text{1. Fall: } & & & & & \text{2. Fall: } \cr 6 &=& x+1 &\vert& -1 & 6 &=& -x+3 &\vert& -3 \cr 5 &=& x_2 & & & 3 &=& -x &\vert& \cdot (-1) \cr & & & & & -3 &=& x_3 & & \end{array}