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Sagot :

Bonjour !

(x + 3) + (x - 4) = 0

x + 3 + x - 4 = 0

2x - 1 = 0

2x - 1 + 1 = 0 + 1

2x = 1

2x/2 = 1/2

x = 1/2

J'espère t'avoir aidé. Bon courage !

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