Answer
\[\left\{ \left( -9,3 \right) \right\}\]
Work Step by Step
Multiply the second equation by 2 and add both the equations as follows:
\[\begin{align}
& x+2y+2x-2y=-3-24 \\
& 3x=-27 \\
& x=-\frac{27}{3} \\
& x=-9
\end{align}\]
Substitute the value of \[x=-9\]in the second equation and solve:
\[\begin{align}
& x-y=-12 \\
& -9-y=-12 \\
& -9+12=y \\
& y=3
\end{align}\]
Hence, the value of x is \[-9\] and y is \[3\].
