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Sagot :

Réponse:

2/3+1/7×(5+1/3)

2/3+1/7×(15/3+1/3)

2/3+1/7×16/3

2/3+16/21

2×7/3×7+16/21

14/21+16/21

30/21 on peut simplifier par 3

10/7

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