Réponses

2014-10-13T18:36:14+02:00
2014-10-13T19:17:46+02:00
2x - 4 = 3 - 5x
2x + 5x = 4 + 3
7x = 7
x = 7 / 7
x = 1

x - 2 = 5x - 4
x - 5x = 2 - 4
- 4x = - 2
x = 2 / 4
x = 1 / 2