Réponse :
bonjour
( x - 1 ) / 2 + 2 = x - 3
( x - 1 ) /2 + 4/2 = 2 x /2 - 6 /2
x - 1 + 4 = 2 x - 6
x - 2 x = - 6 + 1 - 4
- x = - 9
x = 9
2/3 - 4 x = 4/3
- 12 x /3 = 4/3 - 2 /3
- 12 x = 2
x = - 1 /6
6 x - 2 = 5 - x
6 x + x = 5 + 2
7 x = 7
x = 1
3 x - 8 x - 4 = 6 x - 6
- 5 x - 6 x = - 6 + 4
- 11 x = - 2
x = 2/11
Explications étape par étape :
