SVP POUVEZ VOUS M'AIDER POUR CETTE EXERCICE D'UN DM A RENDRE MERCI Résoudre chaque équation a.5x−3 = 6−3x b.7−4x= 3 + 2x c.3(5−2x)= 7−8x d.3−(2x−4) =x+ 7 e.3(2x

Réponse:

a. 5x-3 = 6-3x

5x+3x = 6+3

8x = 9

x = 9/8

b. 7-4x = 3+2x

- 4x-2x = 3-7

- 6x = - 4

x = - 4/-6

x = 4/6

c. 3 (5-2x) = 7-8x

15-6x = 7-8x

- 6x+8x = 7-15

2x = - 8

x = - 8/2

x = - 4

d. 3- (2x-4) = x+7

3-2x+4 = x+7

- 2x-x = 7-3-4

- 3x = 0 cette équation n'admet pas de solution

e. 3 (2x-7)-4 = 7-5 (4-3x)

6x-21-4 = 7-20+15x

6x-15x = 7-20+21+4

- 9x = 12

x = 12/-9

x = 4/-3

Bonjour !

a) 5x-3 = 6-3x

5x+3x = 6+3

8x = 9

x = 9/8

b) 7-4x = 3+2x

-4x-2x = 3-7

-6x = - 4

x = 4/6

x = 2/3

c) 3(5x-2) = 7-8x

15x-6 = 7-8x

15x+8x = 7+6

23x = 13

x = 13/23

d) 3-(2x-4) = x+7

3-2x+4 = x+7

-2x-x = 7-3

-3x = 4

x = -4/3

e) 3(2x-7) - 4 = 7-5(4-3x)

6x-21-4 = 7-20+15x

6x-15x = 7-20+21+4

-9x = 12

x = -12/9

x = - 4/3

Bonne courage.