Use Cramer's Rule to Solve the System $\left\{ \begin{array} { l } 5 x + 2 y - 3 z = 1 \\2 x + 5 y + z = - 4 \\- 3 x + 9 y - z = 5\end{array} \right.$

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Q53: Solve the system of linear equations.

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Q59: Find the inverse of the matrix