Bonjour j'aurais besoins d'aide à cette exercice svp.

Explications étape par étape:

a. 8x + 3 = 0

8x = 0 - 3

8x = -3

x = -3/8 (noté en fraction)

b. 2x - 9 = 0

2x = 0 - 9

2x = -9

x = -9/2

c. 49 - 7x = 0

-7x = - 49

x = -49/-7

x = 7

d. -6x - 5 = 0

-6x = 0 + 5

-6x = 5

x = 5/-6

e. 5x + 12 = 3

5x = 3 - 12

5x = -9

x = -9/5

f. 10x + 1 = -7

10x = -7 - 1

10x = -8

x = -8/10

g. 9x - 2 = 6

9x = 6 + 2

9x = 8

x = 8/9

h. 20 - 4x = -4

- 4x = -4 - 20

-4x = -24

x = -24/-4

x = 6

Voilà, si tu as des questions n'hésite pas