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Solve Using a Matrix by Elimination 1/5x+2/5y+1/5z=6x-1/2y+1/2z=-9 2/5x-7/10y-1/10z=-7

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$

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