Solve for both systems: x = 3y + 4 and x + 5y = 12

Asked by AnneS2 12 years ago 9/6/2013 4:38 AM

Last updated by anonymous 12 years ago 9/7/2013 11:42 PM

Answered by CherieS 12 years ago 9/7/2013 11:42 PM

x = 3y + 4

x + 5y = 12

3y + 4 + 5y = 12

4 + 8y = 12

4-4 + 8y = 12-4

8y=8

8y/8=8/8

y=1

x = 3y + 4

x = 3*1 + 4

x = 3 + 4=7