Precalculus Examples

$4 x - 3 y + z = 18$ , $x + y = 7$

Step 1

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$4 x - 3 y + z = 18, x + y = 7$

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