bonjour pouvez vous m'aidez svp pour l'exercice 22 merci ​

Bonjour

a. 4 (2 - x) + 5 = 3 (2x + 3) - 12

8 - 4x + 5 = 6x + 9 - 12

- 4x - 6x = 9 - 12 - 8 - 5

- 10x = - 16

x = 16/10

x = 1,6

b. (3x + 1) / 4 = (5x - 2) / 5

15x + 5 = 20x - 8

15x - 20x = - 8 - 5

- 5x = - 13

x = 13/5

c. x/3 + 5/6 = 1/2 - x

x/3 + x = 1/2 - 5/6

2x + 6x = 3 - 5

8x = - 2

x = - 2/8

x = - 1/4.

d. x - (x + 1) = (x + 3) - (x - 3)

x - x - 1 = x + 3 - x + 3

x - x - x + x = 3 + 3 + 1

0x = 5

Impossible.