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Solve Using a Matrix with Cramer's Rule 0.025x+0.035y+0.04z+0.06w=5600x+y+z+w=140000w-0.25z=0

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

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