TeX Quellcode:

\begin{array}{crclcl} \text{1. Zeile:} & \ln(2x) &=& \ln(x+1) &\vert& e^{*} \cr\cr \text{2. Zeile:} & {e^{\ln(2x)}} &=& e^{\ln(x+1)} \cr\cr \text{3. Zeile:} & 2x &=& x+1 &\vert& -x \cr\cr& x &=& 1 \in\mathbb{D} \cr\cr\cr& \mathbb{L} &=& {1}\end{array}