pouvez-vous m'aider pour exo 5.Merci​

Réponse:

Bonjour,

4x - (x + 3) = 5 (x-1)

4x - x - 3 = 5x - 5

3x - 3 = 5x - 5

3x - 5x = -5 + 3

-2x = -2

x = - 2/-2

x = 1

3x - 2 (x - 4) = 5 + 4 (1 - 2x)

3x - 2x + 8 = 5 + 4 - 8x

x + 8 = 9 - 8x

x + 8x = 9 - 8

9x = 1

x = 1/9

2 (3x - 5) = 5x - 1

6x - 10 = 5x - 1

6x - 5x = -1 + 10

x = 9

Voilà,

Bonne continuation !!!