TeX Quellcode:

\begin{array}{rclcl}\log_{4}(-3x+15) &=& \ln(4) &\vert& 4^* \\\\-3x+15 &=& 4^{\ln(4)} &\vert& -15 \\-3x &=& 4^{\ln(4)} -15 &\vert& :(-3) \\x &=& -\dfrac{4^{\ln(4)}-15}{3} \approx 2{,}72 \in\mathbb{D} \\\\\mathbb{L} &=& \left\{-\dfrac{4^{\ln(4)}-15}{3}\right\}\end{array}