TeX Quellcode:
\begin{array}{cclll} 2v &=& 16-8w & \vert & :2 \cr v &=& 8-4w \cr \cr -3w &=& 27 & \vert &:(-3) \cr w &=& -9 \cr \cr \dfrac{1}{5}u &=& 100-25v-8w & \vert & \text{Setze v ein} \cr \dfrac{1}{5}u &=& 100-25(8-4w)-8w & \vert & \text{Setze w ein} \cr \dfrac{1}{5}u &=& 100-25(8-4 \cdot(-9))-8 \cdot (-9) \cr \dfrac{1}{5}u &=& 100-25(8+36)+72 \cr \dfrac{1}{5}u &=& 100-25 \cdot 44+72 \cr \dfrac{1}{5}u &=& 100-1100+72 \cr \dfrac{1} {5}u &=& -928 & \vert & \cdot 5 \cr u &=& -4640 \end{array}