bonjour
Merci de mettre ton profil à jour .
x /5 + 22 = 8 + 3 x
x /5 - 3 x = 8 - 22
x / 5 - 15 x /5 = 40/5 - 110/5
- 14 x = - 70
x = 5
3 x - 15 = 2 - x - 3
3 x+ x = 2 - 3 + 15
4 x = 14
x = 14/4 = 7/2
6 - 21 x = 4 - 2 x - 1
- 21 x + 2 x = 4 - 1 - 6
- 19 x = - 3
x = 3/19
