Jawapan

2016-07-15T17:08:44+08:00
7-2+8x=x-2
5+8x=x-2
8x-x=-2-5
7x=-7
x=-7÷7
  =-1
2016-07-17T18:59:37+08:00
7 - 2 + 8x = x - 2
5 + 2 = x - 8x
7 = -7x
-1 = x