Svp quelqu’un pourrait me faire cet exercice ( c’est le n 31) car je galère vraiment là. Merci d’avance.

Bonjour,

a. 5/3x = 4

5/3x = 12/3

5x = 12

x = 12/5

x = 2,4

b. 6x - 7 = 8

6x = 8 + 7

6x = 15

x = 15/6

x = 2,5

c. 8 - 7x = 57

- 7x = 57 - 8

- 7x = 49

x = - 49/7

x = - 7

d. 2x - 11 = 7x + 4

2x - 7x = 4 + 11

- 5x = 15

x = - 15/5

x = - 3

e. 6 - 3x = 15 + 4x

- 3x - 4x = 15 - 6

- 7x = 9

x = - 9/7