Réponses

2014-04-26T15:55:35+02:00
Résoudre l'équation suivante :

4 (x + 5) + 2x = 7x + 14
4x + 20 + 2x = 7x + 14
4x + 2x - 7x = 14 - 20
6x - 7x = -6
-x = -6
x = 6
2014-04-26T15:55:44+02:00
 4(x+5)+2x=7x+14
4x+20+2x = 7x+14
6x+20 = 7x+14
6x-6x+20-14 = 7x-6x+14-14
6 = x