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Solve by Substitution 4x-7y+z=17 , x+y=7

$4 x - 7 y + z = 17$ , $x + y = 7$

Step 1

$4 x - 7 y + z = 17, x + y = 7$

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

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