TeX Quellcode:

\begin{array}{rclcll} -\dfrac{5}{2} &=& \dfrac{2+x}{x-1} & \vert & \cdot (x-1) \cr -\dfrac{5}{2}(x-1) &=& 2+x \cr -\dfrac{5}{2}x+\dfrac{5}{2} &=& 2+x & \vert & -\dfrac{5}{2}-x \cr -\dfrac{7}{2}x &=& -\dfrac{1}{2} & \vert & :\left(-\dfrac{7}{2}\right) \cr x &=& \dfrac{1}{7} \in\mathbb{D} & & \rightarrow \quad P_2\left(\dfrac{1}{7} \mid -\dfrac{5}{2}\right)\end{array}