Werk uit
\(\left\{\begin{matrix}-8y=-94-6x\\5x-7y=-81\end{matrix}\right.\)
\(\left\{\begin{matrix}-8y=-94-6x\\5x-7y=-81\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}6x-8y=-94\\5x-7y=-81\end{matrix}\right.\text{(Niet verplichte stap, proper schrijven)}\\ \Leftrightarrow \left\{\begin{array}{c|c|c}6x-8y=-94& \color{red}{5.} & \color{blue}{7.} \\5x-7y=-81& \color{red}{-6.} & \color{blue}{-8.} \end{array}\right.\\ \Leftrightarrow \left\{\begin{matrix} \color{red}{\underline{30x-30x}-40y+42y=-470+486} \\ \color{blue}{42x-40x\underline{-56y+56y}=-658+648} \end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}2y=16 \\2x=-10\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}y=\frac{16}{2}=8 \\x=\frac{-10}{2}=-5\end{matrix}\right.\\ \qquad V=\{(-5,8)\}\)