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Sagot :

-7/5 | 6 + 1/5 = -7/5 | 6/1 + 1/5
= -7/5 | 30/5 + 1/5
= -7/5 | 31/5
= -7/5 * 5/31
= - 7/31
( | représente la barre principale)

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