Respuestas

2013-08-29T19:38:06+02:00
- 2 x + 8 + 6 = 4
- 2 x = 4 - 8 - 6
- 2 x = -10
x = (-10) / (-2)
x = 5
2013-08-29T19:39:58+02:00

- 2(x - 4) + 6 = 4
- 2x + 8 + 6 = 4
           - 2x = 4 - 8 - 6
           - 2x = - 10
               x = - 10/-2                    x = 5