Find the matrix A such that $\left[\begin{array}{cc}5 & -7 \\ -2 & 3\end{array}\right], A=\left[\begin{array}{cc}-16 & -6 \\ 7 & 2\end{array}\right]$.
$A=\left[\begin{array}{ll}1 & -4 \\ 3 & -6\end{array}\right]$
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