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Sagot :

Réponse:

a. x - 4 = 0 ;. x + 9 = 0

x = 4. x = -9

b. 4x - 1 = 0 ;. 9x - 2 = 0

4x = 1. 9x = 2

x = 1/4. x = 2/9

c. 3x + 2 = 0

3x = -2

x = -2/3

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