TeX Quellcode:

\begin{array}{rclll}-1 &=& \dfrac{\sqrt{2x+14}}{6}-14 &\vert & +14\cr 13 &=& \dfrac{\sqrt{2x+14}}{6} &\vert & \cdot 6\cr 78 &=& \sqrt{2x+14} &\vert & ()^2\cr 6.084 &=& 2x+14 &\vert & -14\cr 6.070 &=& 2x &\vert & :2\cr x &=& 3.035 \in\mathbb{D}\end{array}