Jawabanmu

2014-08-27T20:08:20+07:00
(4+(-7) + (12+5) =-3+17 =14
(4+(-7)) + (12+5) = (4-7) + (12+5) = (-3) + 17 = 14
2014-08-27T20:09:12+07:00
(4+(-7)) + (12+5) = 4-7= -3 + (12+5) =-3 +17= 14