Combinatie
\(\left\{\begin{matrix}-2x-4y=-26\\-5x=-10y+35\end{matrix}\right.\)
\(\left\{\begin{matrix}-2x-4y=-26\\-5x=-10y+35\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}-2x-4y=-26\\-5x+10y=35\end{matrix}\right.\text{(Niet verplichte stap, proper schrijven)}\\ \Leftrightarrow \left\{\begin{array}{c|c|c}-2x-4y=-26& \color{red}{5.} & \color{blue}{5.} \\-5x+10y=35& \color{red}{-2.} & \color{blue}{2.} \end{array}\right.\\ \Leftrightarrow \left\{\begin{matrix} \color{red}{\underline{-10x+10x}-20y-20y=-130-70} \\ \color{blue}{-10x-10x\underline{-20y+20y}=-130+70} \end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}-40y=-200 \\-20x=-60\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}y=\frac{-200}{-40}=5 \\x=\frac{-60}{-20}=3\end{matrix}\right.\\ \qquad V=\{(3,5)\}\)
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