Question

Solve each system of equations.

1. 2x - 4y = 20
x = 4
2. y = 6x + 11
2x - 3y = 7

Answer 1

1. y=-3
2. y=33
y=-1
( sorry if number 2 is wrong)

Answer 2

1. 2(4) - 4y = 20

8 -4y = 20
8-8 -4y = 20 - 8
-4/-4y = 12/-4
y = -3