Jawabanmu

2014-01-29T22:06:10+07:00
 x-1 - 1= 3
  2
x-1    = 3+1
 2
x-1 = 4
 2
x-1 = 4 . 2
x-1 = 8
x = 8+1
x= 9


2014-01-29T22:07:34+07:00
x-1 - 1 = 3
 2
x-1 = 3+1
 2
x-1 = 4
2
x-1 = 4.2
x-1 = 8
x   = 8+1
x   = 9