Combinatie
\(\left\{\begin{matrix}8x+5y=75\\-7y-6x=-53\end{matrix}\right.\)
\(\left\{\begin{matrix}8x+5y=75\\-7y-6x=-53\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}8x+5y=75\\-6x-7y=-53\end{matrix}\right.\text{(Niet verplichte stap, proper schrijven)}\\ \Leftrightarrow \left\{\begin{array}{c|c|c}8x+5y=75& \color{red}{3.} & \color{blue}{7.} \\-6x-7y=-53& \color{red}{4.} & \color{blue}{5.} \end{array}\right.\\ \Leftrightarrow \left\{\begin{matrix} \color{red}{\underline{24x-24x}+15y-28y=225-212} \\ \color{blue}{56x-30x\underline{+35y-35y}=525-265} \end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}-13y=13 \\26x=260\end{matrix}\right.\\ \Leftrightarrow \left\{\begin{matrix}y=\frac{13}{-13}=-1 \\x=\frac{260}{26}=10\end{matrix}\right.\\ \qquad V=\{(10,-1)\}\)
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