Solve for 5x + 4y = - 3 and - 4x - 4y = - 4

- 4x - 4y = - 4

- 4x - 4y+4x = - 4+4x

-4y= - 4+4x

-4y/-4= - 4/-4+4x/-4

y=1-x

5x + 4y = - 3

5x + 4(1-x) = - 3

5x + 4(1) (4)(-x) = - 3

5x+4-4x=-3

x+4=-3

x+4-4=-3-4

x=-7

y=1-x

y=1--7

y=8