TeX Quellcode:
\begin{array}{rclcl} f_5 (x_s) &=& f_6(x_s) \cr \cr 4x_s-8 &=& -2x_s+8 &\vert& +8+2x_s \cr \cr 6x_s &=& 16 & \vert& : (6) \cr \cr x_s &=& \dfrac{16}{6}=\dfrac{8}{3} \end{array}