Ответы и объяснения

2014-04-14T16:04:53+00:00
1/2x + 1/6x = x-3

1/2x + 1/6x - x = -3

3/6x - 1/6x - 6/6x = -3
2/6 x - 6/6x = -3
- 4/6x = -3
- 2/3x = -3
-x = -3:2/3

  x = 3*3/2
  x= 9/2

  x = 4 1/2