merci d’avance pour ceux qui m’aide :)

Merci Davance Pour Ceux Qui Maide class=

Sagot :

Bonjour

2x + 5 = - 5x - 5

2x + 5x = - 5 - 5

7x = - 10

x = - 10/7

4 (3x - 5) = 3 + 2 (x - 1)

12x - 20 = 3 + 2x - 2

12x - 2x = 3 - 2 + 20

10x = 21

x = 21/10

2x/3 = (x + 6) / 5

10x = 3x + 18

10x - 3x = 18

7x = 18

x = 18/7.