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Sagot :

TEAMCE

Bonsoir,

Résoudre l'équation :

3(x - 1) = x + 7

3x - 3 = x + 7

3x - 3 + 3 = x + 7 + 3

3x = x + 10

3x - x = x + 10 - x

2x = 10

x = 10/2

x = 5

Bonne soirée.

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