TeX Quellcode:
\begin{array}{rclll}\dfrac{3x}{5}-\dfrac{4}{5}x+2x &=& x+4 \cr\cr \dfrac{3}{5}x-\dfrac{4}{5}x+\dfrac{10}{5}x &=& x+4 \cr\cr \dfrac{9}{5}x &=& x+4 & \vert & -x \cr\cr \dfrac{9}{5}x-\dfrac{5}{5}x &=& 4 \cr\cr \dfrac{4}{5}x &=& 4 &\vert & \cdot \dfrac{5}{4} \cr\cr x &=& 5 \end{array}