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Solve by Substitution 4x-5y+z=7 , x+y=5

$4 x - 5 y + z = 7$ , $x + y = 5$

Step 1

$4 x - 5 y + z = 7, x + y = 5$

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

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