Réponse :
bonjour
4 x - 3 = 17
4 x = 17 + 3
4 x = 20
x = 5
- 5 x = 2 x - 35
- 5 x - 2 x = - 35
- 7 x = - 35
x = 5
4 x + 5 = - 5 x + 23
4 x + 5 x = 23 - 5
9 x = 18
x = 2
x
- 3 x
- 3 x + 6
- 3 x + 6 = 12
- 3 x = 12 - 6
- 3 x = 6
x = - 2
Explications étape par étape :