Réponse :
bonjour
pour mieux comprendre donc je te montre
3 x + 8 + 2 x + 5 = 0
5 x = - 5 - 8
5 x = - 13
x = - 13/ 5
5 x + 15 - 2 x - 8 x = 0
- 5 x = - 15
x = 15/5 = 3
continue
2 ( x + 2 ) = 3 ( 5 x + 3 ) - 2
2 x + 4 = 15 x + 9 - 2
2 x - 15 x = 9 - 2 - 4
- 13 x = 3
x = - 3 /13
( x + 5 ) + 2 ( x + 1 ) = 0
x + 5 + 2 x + 2 = 0
3 x = - 2 - 5
3 x = - 7
x = - 7 /3
continue
4 x /3 - 3 = 2 x /3 + 5 /2
8 x /6 - 18/6 = 4 x /6 + 15/6
8 x - 4 x = 15 + 18
4 x = 33
x = 33/4
x /2 - 3 = 3 x /2 + 5 /2
x /2 - 6 /2 = 3 x /2 + 5 /2
x - 3 x = 5 + 6
- 2 x = 11
x = - 11/2 = - 5.5
- 3 x / 5 - 2/5 = 1/5 - 5 x + 5
- 3 x / 5 - 2 /5 = 1 /5 - 25 x /5 + 25/5
- 3 x + 25 x = 1 + 25 + 2
22 x = 28
x = 28/22 = 14/11
continue
Explications étape par étape
