Jawabanmu

2014-09-04T15:42:03+07:00
-10+60:2x5 = -10+30x5
= -10+150 = 140
2014-09-04T15:42:08+07:00
-10+60:2x5 = -10+60:(2x5)
                 = -10+(60:10)
                 = -10 + 6 = -4