Jawabanmu

2014-03-16T10:07:12+07:00
25 - 4y = 6y + 15
-4y - 6y = 15 - 25
-10y = -10
y = -10/-10
y=1
2014-03-16T10:12:51+07:00
25-4y=6y+15
-6y-4y=15-25
-10y=-10
10y=10
y=1