2x-y=5 x-y=4

Question
Answer:
$\left\{\begin{array} { l } 2x-y=5 \\ x-y=4\end{array} \right.$
$\left\{\begin{array} { l } 2x-y=5 \\ -x+y=-4\end{array} \right.$
$x=1$
$1-y=4$
$y=-3$
$\left( x, y\right)=\left( 1, -3\right)$
$\left\{\begin{array} { l } 2 \times 1-\left( -3 \right)=5 \\ 1-\left( -3 \right)=4\end{array} \right.$
$\left\{\begin{array} { l } 5=5 \\ 4=4\end{array} \right.$
$\left( x, y\right)=\left( 1, -3\right)$
solved
general 10 months ago 2484