System of Equations

Question

Solve the system of equations:

 

y=2x-4

y=5x+8

Answer 1

y=2x-4

y=5x+8

2x-4=5x+8

-4-8=5x-2x

-12=3x

x=-12/3

x=-4

substitute into either equation

y=2(-4)-4

y=-8-4

y=-12

(-4,-12)