Question

Use substitution to solve 2x2=5+y and 4y= -20+8x2

Solve the first equation for Y and substitute it into the second equation. The resulting equation is?

Answer 1

Explanation:

First

2 × 2 = 5 + y

y = -1

And

4y = -20 + 8 × 2

4 × (-1) = -4

-4 = -4

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