Solve the equation -4x + 7 y equals 20. Y=3x+15

1 answer:

3 0

Substitue what y equals for y and solve.

$-4x+7(3x+15)=20 \\-4x+27x+105=20 \\23x=-85 \\x=-\boxed{\frac{85}{23}}$

Hope this helps.

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