Jawabanmu

2014-09-07T23:43:27+07:00
5z + 3 - ( 2z - 7 )
= 5z + 3 - 2z + 7
= 5z - 2z + 3 + 7
= 3z + 10
2014-09-07T23:43:39+07:00
Jawabannya benar , gk usah pd aja