Jawabanmu

2014-09-08T21:47:35+07:00
A.4x-11y-9z--8+10y-9z
4x-11y+10y-9z-9z+8
4x-1y-18z+8
b.4(7y"+6y-5)--5(4y"-2y+8)
28y"+24y-20+20y"+10y-40
28y"+20y"+24y+10y-20-40
48y"+34y-60
6 4 6