Solve for both systems: - 5x + 3y = 28 and 3x - 3y = - 12

Asked by AnneS2 on 11 Oct 07:53

Last updated by anonymous on 12 Oct 10:44

Answered by CherieS on 12 Oct 10:44

- 5x + 3y = 28

- 5x+5x + 3y = 28+5x

3y = 28+5x

3y /3= 28+5x/3

y=9.33+1.67x

3x - 3y = - 12

3x - 3(9.33+1.67x) = - 12

3x - 3(9.33) (-3)(+1.67x) = - 12

3x - 27.99 -5.01x = - 12

- 27.99 -2.01x = - 12

- 27.99 -2.01x+27.99 = - 12+27.99

-2.01x=16

-2.01x/-2.01=16/-2.01

x=-8

y=9.33+1.67x

y=9.33+1.67(-8)

y=9.33+-13.36=-4.03