Solve 4x - y = 7 and 4x + 3y = 11

Asked by AnneS2 on 08 Jun 12:15

Last updated by anonymous on 09 Jun 12:32

Answered by CherieS on 09 Jun 12:32

4x - y = 7

4x - y-4x = 7-4x

-y=7-4x

-y/-1=7/-1-4x/-1

y=-7+4x

4x + 3y = 11

4x + 3(-7+4x) = 11

4x + 3(-7) (3)(+4x) = 11

4x-21+12x=11

-21+16x=11

-21+16x+21=11+21

16x=32

16x/16=32/16

x=2