Werk uit
\(\left\{\begin{matrix}8y=-10-2x\\8x-2y=28\end{matrix}\right.\)
\(\left\{\begin{matrix}8y=-10-2x\\8x-2y=28\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}2x+8y=-10\\8x-2y=28\end{matrix}\right.\text{(Niet verplichte stap, proper schrijven)}\\ \Leftrightarrow \left\{\begin{array}{c|c|c}2x+8y=-10& \color{red}{4.} & \color{blue}{1.} \\8x-2y=28& \color{red}{-1.} & \color{blue}{4.} \end{array}\right.\\ \Leftrightarrow \left\{\begin{matrix} \color{red}{\underline{8x-8x}+32y+2y=-40-28} \\ \color{blue}{2x+32x\underline{+8y-8y}=-10+112} \end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}34y=-68 \\34x=102\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}y=\frac{-68}{34}=-2 \\x=\frac{102}{34}=3\end{matrix}\right.\\ \qquad V=\{(3,-2)\}\)