Answer
$x=-4$
$y=22$
Work Step by Step
$\begin{pmatrix}
x & -2\\
7 & y
\end{pmatrix}=\begin{pmatrix}
-4 & -2\\
7 & 22
\end{pmatrix}$
All we need to do here is compare elements:
$x=-4$
$y=22$
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