Question

find x and y using substitution
x=6y-4
x=-2y+28

what to do next?

Answer 1

This is pretty simple really:

since both equation = x, we can set them equal to each other.

Answer 2

6y -4 = -2y +28

get like terms together:

6y +2y = 28 +4

combine the like terms:

8y = 32

get y all by its little lonesome by dividing both sides by (8):

8y/8 = 32/8

y = 4

Answer 3

double check to make sure and:

x=6(4)-4

x = 24 - 4 = 20

x=-2(4)+28 = -8 + 28 = 20

were good to go....