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Réponse:

bonsoir

Explications étape par étape:

3x = 2x + 5

3x - 2x = 5

x = 5

4 - 5x = 9x

- 5x - 9x = - 4

- 14x = - 4

x= 4/14 = 2/7

- 4x + 2 = x + 11

- 4x - x = 11 - 2

- 5x = 9

x = - 9/5

3x - 7 = - 2x - 9

3x + 2x = - 9 + 7

5x = - 2

x = - 2/5

5x - 1 = 7x - 1

5x - 7x = 1 - 1

- 2x = 0

x = 0

8x + 1/3 = 3x + 4/6

8x - 3x = 4/6 - 1/3

5x = 2/3 - 1/3

5x = 1/3

x = 1/15