Jawabanmu

2014-09-04T19:28:05+07:00
5(6x-7)-9(3y+7y)
30x - 35 - 9 (10y)
30x - 35 - 90y
2014-09-04T19:28:06+07:00
= 30x-35-27y-63y
= 30x-35-90y

kl ga slah itu