Combinatie
\(\left\{\begin{matrix}10x+6y=-74\\-4x-2y=26\end{matrix}\right.\)
\(\left\{\begin{matrix}10x+6y=-74\\-4x-2y=26\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{array}{c|c|c}10x+6y=-74& \color{red}{2.} & \color{blue}{1.} \\-4x-2y=26& \color{red}{5.} & \color{blue}{3.} \end{array}\right.\\ \Leftrightarrow \left\{\begin{matrix} \color{red}{\underline{20x-20x}+12y-10y=-148+130} \\ \color{blue}{10x-12x\underline{+6y-6y}=-74+78} \end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}2y=-18 \\-2x=4\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}y=\frac{-18}{2}=-9 \\x=\frac{4}{-2}=-2\end{matrix}\right.\\ \qquad V=\{(-2,-9)\}\)
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