Réponse :
bonsoir
2 x - 3 = 15
2 x = 18
x = 9
5 x + 3 = 38
5 x = 38 - 3 = 35
x = 7
4 x + 7 = - 6 x - 4 - 2x
4 x + 6 x + 2 x = - 4 - 7
12 x = - 11
x = - 11/12
10 x - 10 - 6 x = 6 - 5 x
4 x + 5 x = 6 + 10
9 x = 16
x = 16/9
9 x /7 = - 21 /4
36 x = - 147
x = - 147/36 = - 49/ 12
Explications étape par étape
