Jawabanmu

2014-09-10T19:52:22+07:00
(4y-8)-(2y+15z)
4y-8-2y-15z
4y-2y-15z-8
2y-15z-8
3 3 3
2014-09-10T19:54:30+07:00
( 4y - 8 ) - ( 2y+ 15z ) = 4y - 8 -2y - 15z
                                = 2y - 15z - 8