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Sagot :

ISWAAK
Exercice 2 : 3+2= 5, 5x3 = 15 15-6 = 9
-4+2 = -2, -2x3 = -6, -6-6= -12
N= ((x+2)x3)-6
Développement :

((x+2)x3)-6
(3x+6)-6
3x = N

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