Jawabanmu

2014-09-02T18:18:58+07:00
(8x+2x+5x-2x)+(9x+5y-6x-4y)=8x+2x+5x-2x+9x+5y-6x-4y
=16x+y



2014-09-02T18:22:02+07:00
(8x+2x+5x-2x)+(9x+5y-6x-4y)
= 8x+2x+5x-2x + 9x-6x-4y
= 13x               + 3x +y
= 16x + y