Jawabanmu

2014-01-11T16:15:29+07:00
3x + 12 = 7x
12 = 7x - 3x
12 = 4x
x = 3

x + 2 = 3 + 2 = 5
3 3 3
2014-01-11T16:16:28+07:00
3x + 12 = 7x
12 = 7x-3x
12 = 4x
x = 3

X + 2
3 + 2 = 5
1 3 1