Réponses

2014-10-02T22:44:48+02:00
Bonsoir,

7x = 5x+15
7x-5x = 15
2x = 15
x = 7,5

Bonne soirée.
Meilleure réponse !
2014-10-02T22:45:51+02:00
7x = 5x + 15
7x - 5x = 15
2x = 15
x = 15/2 
x = 7.5