3z + 6 = 9 + 7(z + 3) Solve for the unknown

Asked by AnneS2 12 years ago 8/6/2013 6:29 AM

Last updated by anonymous 12 years ago 8/7/2013 1:41 PM

Answered by CherieS 12 years ago 8/7/2013 1:41 PM

3z + 6 = 9 + 7(z + 3)

3z + 6 = 9 + 7(z) (7)( + 3)

3z + 6 = 9+7z+21

3z + 6 = 7z+30

3z + 6-6 = 7z+30-6

3z=7z+24

3z-7z=7z+24-7z

-4z=24

-4z/-4=24/-4

z=-6