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2x y 5 x y 4

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2x-y=5 x-y=4

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Answer to a math question 2x-y=5 x-y=4

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$\left\{\begin{array} { l } 2x-y=5 \\ x-y=4\end{array} \right.$

$\left\{\begin{array} { l } 2x-y=5 \\ -x+y=-4\end{array} \right.$

$x=1$

$1-y=4$

$y=-3$

$\left( x, y\right)=\left( 1, -3\right)$

$\left\{\begin{array} { l } 2 \times 1-\left( -3 \right)=5 \\ 1-\left( -3 \right)=4\end{array} \right.$

$\left\{\begin{array} { l } 5=5 \\ 4=4\end{array} \right.$

$\left( x, y\right)=\left( 1, -3\right)$

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