Jawabanmu

2014-01-16T18:58:20+07:00
4 ( 7-3y) = 2 (9y+5) + 15
28-12y = 18y + 10 + 15
28-12y = 18y + 25
28-25 =18y+12y
3 = 6y
y= 3/6 = 1/2
1 3 1
2014-01-16T19:00:22+07:00
4 (7-3y) = 2 (9y +5) +15
28 - 12y = 18y + 10+ 15
-12y = 18 y + 10 +15 -28
-12y - 18y = 25 - 28
-30 y = -3
y = -3 / -3o
y = 0.1