Jawabanmu

2014-08-29T21:19:08+07:00
(6x + 4) - (x-y) = 6x + 4 - x + y = 5x + 4 + y
2014-08-29T21:23:29+07:00
(6x + 12) - ( 14x : 12 ) = 122 x2