Solve for both systems: - 2x + 4y = - 22 and - 2x - 4y = 42

Asked by AnneS2 on 11 Oct 07:48

Last updated by anonymous on 12 Oct 11:50

Answered by CherieS on 12 Oct 11:50

- 2x + 4y = - 22

- 2x + 4y-4y = - 22 -4y

-2x=- 22 -4y

-2x/-2=- 22 -4y/-2

x=11+2y

- 2x - 4y = 42

- 2(11+2y) - 4y = 42

- 2(11) (-2)(+2y) - 4y = 42

-22-4y-4y=42

-22-8y=42

-22-8y+22=42+22

-8y=64

-8y/-8=64/-8

y=-8

x=11+2y

x=11+2(-8)

x=11-16=-5