Bonjour pouvez-vous m’aider pour cet exercice

bonjour

7x + 2 = 2x + 3

7x - 2 x = +3 - 2

5x = 1

x = 1/5

3/x = 7/8

7*x= 3*8

7x = 24

x = 24/7

8(9-x) = 10x+4

72 - 8 x = 10x + 4

-8x - 10x = 4 - 72

-18x = -68

x = 68/18 = 34/9

(5x+6) (3x-9) = 0

soit 5x+6 = 0 => x = -6/5

soit 3x-9 = 0 => x = 3

(4x+1) (3x-7) = (6x+8) (2x-1)

12x² - 28x + 3x - 7 = 12x² - 6x + 16x - 8

-25x - 10x = -8 + 7

-35x = -1

x = 1/35

:)