Jawabanmu

2014-09-10T09:27:22+07:00
5x+3y+(-7y+4y)=5x+3y+(-7y)+4y=5x
salah woyy
5x+3y+(-7x+4y)=5x+3y+(-7x)+4y=5x-7x+3y+4y=-2x+7y

iyo woooy...
oyi
2014-09-10T11:59:59+07:00