Jawabanmu

2014-01-26T15:27:39+07:00
3s+11=-28
3s=-28-11
3s=-39
s=-13

25-4y=6y+15
4y+6y=25-15
10y=10
y=1

6x+5=26-x
6x+x=26-5
7x=21
x=3

2-4x=3
4x=2-3
4x=-1
x=-1/4