Question

What is the result of substituting for y in the bottom equation?
y=x-7
y=2+2x-4

Answer 1

Plug x-7 in for y, in the bottom equation.

x - 7 = 2 + 2x - 4

x - 7 = 2x - 2

x = 2x + 5

-x = 5

x = -5