If \( A=\left[\begin{array}{ccc}2 & 1 & 3 \\ 1 & 3 & -1 \\ -2 & 1 &...

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If \( A=\left[\begin{array}{ccc}2 & 1 & 3 \\ 1 & 3 & -1 \\ -2 & 1 & 1\end{array}\right] \), find \( A^{-1} \)
\( \mathrm{P} \)
W
Using \( A^{-1} \) solve the following system of equations:
\[
2 x+y+3 z=9, x+3 y-z=2,-2 x+y+z=7
\]
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