Jawabanmu

2014-08-26T12:02:18+07:00
5. A + B = (4x+5) + (3x-4) = 7x + 1
a - b = (4x+5) - (3x-4) = x + 9
a+b+c = (4x+5) + (3x-4) + (9x-3) = 16x -2