TeX Quellcode:
\begin{array}{rclll} -3 \, (6y+2) &=& 12y-5 \cr -18y-6 &=& 12y-5 & \vert & -12y+6 \cr -18y-12y &=& -5+6 \cr -30y &=& 1 & \vert & :(-30) \cr y &=& -\dfrac{1}{30} \not\in\mathbb{D} \cr \cr \mathbb{L} &=& \emptyset \end{array}