Solve for 3x + y = 25 and 3x + 5y = 17

Asked by AnneS2 12 years ago 7/14/2013 8:44 AM

Last updated by anonymous 12 years ago 7/15/2013 4:18 PM

Answered by CherieS 12 years ago 7/15/2013 4:18 PM

3x + y = 25

3x + y-3x = 25-3x

y= 25-3x

3x + 5y = 17

3x + 5(25-3x) = 17

3x + 5(25) (5)(-3x) = 17

3x+125-15x=17

125-12x=17

125-12x-125=17-125

-12x=-108

-12x/-12=-108/-12

x=9

y= 25-3x

y= 25-3(9)

y= 25-27=-2