Solve for both systems: 4x = - y + 14 and x = - 5y + 13

Asked by AnneS2 12 years ago 8/12/2013 6:27 AM

Last updated by anonymous 12 years ago 8/13/2013 5:45 PM

Answered by CherieS 12 years ago 8/13/2013 5:45 PM

4x = - y + 14

4x +y= - y+y + 14

4x +y=14

4x-4x +y=14-4x

y=14-4x

x = - 5y + 13

x = - 5(14-4x) + 13

x = - 5(14) (-5)(-4x) + 13

x=-70+20x+13

x=-57+20x

x-20x=-57+20x-20x

-19x=-57

-19x/-19=-57/-19

x=3

y=14-4x

y=14-4(3)

y=14-12=2