Solve for both systems: - 5x + 4y = 75 and - 5x + 2y = 55

- 5x + 2y = 55

- 5x+5x + 2y = 55+5x

2y = 55+5x

2y/2 = 55+5x/2

y=27.5+2.5x

- 5x + 4y = 75

- 5x + 4(27.5+2.5x) = 75

- 5x + 4(27.5) (4)(+2.5x) = 75

-5x+110+10x=75

110+5x=75

110+5x-110=75 -110

5x=-35

5x/5=-35/5

x=-7

y=27.5+2.5x

y=27.5+2.5(-7)

y=27.5-17.5=10