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Sagot :

Bonjour

(3x + 4) / 5 = 3x

3x + 4 = 15x

3x - 15x = - 4

- 12x = - 4

x = 4/12

x = 1/3.

8 (2x + 1) = 5 (4x - 2)

16x + 8 = 20x - 10

16x - 20x = - 10 - 8

- 4x = - 18

x = 18/4

x = 9/2

3x² + 6 = 3x (5 + x)

3x² + 6 = 15x + 3x²

3x² - 3x² - 15x = - 6

- 15x = - 6

x = 6/15

x = 2/5.

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