# 16) If $\operatorname{adj} A=\left[\begin{array}{ccc}-1 & 2 & 2 \\ 1 & 1 & 2 \\ 2 & 2 & 1\end{array}\right]$ find $A^{-1}$

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16) If $\operatorname{adj} A=\left[\begin{array}{ccc}-1 & 2 & 2 \\ 1 & 1 & 2 \\ 2 & 2 & 1\end{array}\right]$ find $A^{-1}$