Svp aidez moi Seulement les encadré

Bonjour,

3/2x + 4 = 2x - 5

3/2x + 8/2 = 4/2x - 10/2

3x + 8 = 4x - 10

3x - 4x = - 10 - 8

- x = - 18

x = 18

(2x + 3) / 6 - (x - 1) / 6 = (x + 2) / 3 + 2

(2x + 3) / 6 - (x - 1) / 6 = (2x + 4) / 6 + 12/6

2x + 3 - x - 1 = 2x - 4 + 12

2x - x - 2x = - 4 + 12 - 3 + 1

- x = 6

x = - 6

(3 - 2x) / 5 - (x - 2) / 10 = (5x + 2) / 2 - 1/5

(6x - 4x) / 10 - (x - 2) / 10 = (25x + 10) / 2 - 2/10

6x - 4x - x + 2 = 25x - 2

6x - 4x - x - 25x = - 2 - 2

- 24x = - 4

x = 4/24

x = 1/6

2x + 3) / 2 = (7x - 2) / 3

6x + 9 = 14x - 4

6x - 14x = - 4 - 9

- 8x = - 13

x = 13/8