Solve for both systems 5x + 4y = - 25 and - 5x + 3y = - 45

5x + 4y = - 25

5x-5x + 4y = - 25 -5x

4y = - 25 -5x

4y /4= - 25 -5x/4

y=-6.25-1.25x

- 5x + 3y = - 45

- 5x + 3(-6.25-1.25x) = - 45

- 5x + 3(-6.25) (3)(-1.25x) = - 45

- 5x-18.75-3.75x = - 45

-18.75-8.75x = - 45

-18.75-8.75x+18.75 = - 45+18.75

-8.75x=26.25

-8.75x/-8.75=26.25/-8.75

x=-3

y=-6.25-1.25x

y=-6.25-1.25(-3)

y=-6.25--3.75=-6.25+3.75=-2.5