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Sagot :

Bonsoir

K = (11/7 - 3/5) x 25/2

K = [(11 x 5) / (7 x 5) - (3 x 7) / (5 x 7)] x 25/2

K = (55/35 - 21/35) x 25/2

K = 34/35 x 25/2

K = 850/70

K = (10 x 85) / (10 x 7)

K = 85/7.

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