Solve 3x + 4y = - 12 and 5x - 4y = - 52

Asked by AnneS2 on 14 Jun 09:42

Last updated by anonymous on 15 Jun 13:40

Answered by CherieS on 15 Jun 13:40

3x + 4y = - 12

3x + 4y -4y= - 12 -4y

3x= - 12 -4y

3x/3= - 12/3 -4y/3

x=-4-1.33y

5x - 4y = - 52

5(-4-1.33y) - 4y = - 52

5(-4) (5)(-1.33y) - 4y = - 52

-20-6.67y- 4y = - 52

-20-10.67y = - 52

-20-10.67y+20 = - 52+20

-10.67y=32

-10.67y/-10.67=32/-10.67

y=-3

x=-4-1.33y

x=-4-1.33(-3)

x=-4+4

x=0