Jawabanmu

2014-09-13T10:30:44+07:00
6 per 9 = 10 per 10+x Kemudian disederhanakan jadi 10+x= 15 x=15-10 x=5
2014-09-13T11:21:38+07:00
6/9 = 10/10+x
60+6x = 90
6x = 90 - 60
6x = 30
x = 30/6
x = 5