Solve for - 5x - 4y = - 16 and 5x + 2y = 18

5x + 2y = 18

5x + 2y-5x = 18-5x

2y= 18-5x

2y/2= 18-5x/2

y=9-2.5x

- 5x - 4y = - 16

- 5x - 4(9-2.5x) = - 16

- 5x - 4(9) (-4)(-2.5x) = - 16

-5x-36+10x=-16

-36+5x=-16

-36+5x+36=-16+36

5x=20

5x/5=20/5

x=4

y=9-2.5x

y=9-2.5(4)

y=9-10=-1