Jawabanmu

2014-08-25T19:05:26+07:00
1. (5x+3) - (x-1)=5x+3-x+1=4x+4
2.  (2y+15z) - (4y-8) = 2y+15z-4y+8= -2y+15z+8
3. (x-y) - (6x+4) = x-y-6x-4= -5x-y-4