Jawabanmu

2014-08-17T21:04:29+07:00
= 3x - 6y - 2x + 4y = x - 2y
= 3x - 6y - (2x - 4y)
=3x - 6y - 2x + 4y
=3x - 2x - 6y + 4y
= x - 2y
2014-08-17T21:12:48+07:00
=3(x-2y)-(2x-4y)
=3(x-2y)-2x+4y
=3x-6y-2x+4y
= x-2y