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Sagot :

JODEVI

Réponse :

(2/3 * X -2/5)

X=3  alors 2/3 * 3 -2/5 = 2 -2/5 = 10/5 -2/5 = 8/5

X=6/7 alors 2/3 * 6/7 -2/5 = 12/21 - 2/5 = 60/105 - 42/105 = 18/105 = 6/35

X= - 11/5 alors 2/3 * -11/5 -2/5 = -22/15 -2/5 = -22/15 -6/15 = -28/15

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