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Sagot :

Bonjour

18x + 7 = 2(8x + 3)

18x + 7 = 16x + 6

18x - 16x = 6 - 7

2x = - 1

x = - 1/2.

Explications étape par étape:

18x + 7 = 16x + 6

18x - 16x = 6 - 7

2x = - 1

x = - 1/2

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