Jawabanmu

Jawaban paling cerdas!
2014-01-29T22:10:23+07:00
A) 3(y-5)+2=y+7
    3y-15+2=y+7
   3y-y=7+15-2
    2y=20
    y=10
b) gak tulis soalnya(langsung kali silang)
   15x+10=16x-12
   10+12=16x-15x
   22=x
1 5 1
2014-01-29T22:12:29+07:00
A.3y-15+2= y + 7
3y+y= 7 + (-13)
4y.1/4=-20.1/4
y=-5
b.-5