Jawabanmu

2014-08-11T20:20:18+07:00


9a + 12 - (7a + 14) = (9a-7a) + (12-14) = 2a + (-2) = 2a - 2


11x"-17x+24 - (2x"+15x-18 ) = 9x" - 32x + 42 

2 4 2