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Sagot :

(Hep,hep,hep avant de lire on met le MERCI et les 5 ETOILES)

Réponse :

7x + 12 = -2x + 3

7x + 12 + 2x = 3

9x + 12 = 3

9x = 3 - 12

9x = -9

x = 1

Réponse:

7x + 12= -2x + 3

7x + 12 = 1

7x = 1 - 12

7x = -11

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