salut j'aurais besoin d'aide merci ces sur l'equation ^^ 10. 2(x + 7) = 4 11. -2x - 4 = 8 12. 2(x + 9) = 22 13. 2(x + 3) = 18 14. -5(x - 7) = -5 15. 4(x + 5) =

Bonsoir,

10. 2(x + 7) = 4

2x + 14 = 4

2x = 4 - 14

2x = - 10

x = - 10/2

x = - 5

11. -2x - 4 = 8  

- 2x = 8 + 4

- 2x = 12

x = - 12/2

x = - 6

12. 2(x + 9) = 22

2x + 18 = 22

2x = 22 - 18

2x = 4

x = 4/2

x = 2

13. 2(x + 3) = 18  

2x + 6 = 18

2x = 18 - 6

2x = 12

x = 12/2

x = 6

14. -5(x - 7) = -5  

- 5x + 35 = - 5

- 5x = - 5 - 35

- 5x = - 40

x = 40/5

x = 8

15. 4(x + 5) = 8

4x + 20 = 8

4x = 8 - 20

4x = - 12

x = - 12/4

x = - 3.