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Sagot :

VINS

bonjour

3 a - 7

pour a =  2 = 6 - 7 = - 1

- 2 b - 9

pour  b = - 5  = 10 - 9 = 1

ZEDOFF

Réponse:

3x2 - 7 = 6-7 = -1

-2x-5 -9 = 10 - 9 = 1

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