Solve the systems in Problems 27-54 by solving the corresponding matrix equation with an inverse, if possible.
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Solve the systems in Problems 27-54 by solving the corresponding matrix equation with an inverse, if possible.
\(\left\{\begin{array}{l}x+2 z=7 \\ 2 x+y=16 \\ -2 y+9 z=-3\end{array}ight.\)
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