TeX Quellcode:
\begin{array}{rclll} 6 \, (2x-4)-7 &=& 9-8\left(\dfrac{1}{4}x+5\right) \cr 12x-24-7 &=& 9-2x-40 \cr 12x-31 &=& -2x-31 & \vert & +2x+31 \cr 12x+2x &=& -31+31 \cr 14x &=& 0 & \vert & :14 \cr x &=& 0 \end{array}