Réponse :
bonjour
A = -7 + 12 - 4 + 9 - 7
= -7 - 4 - 7 + 12 + 9
= -18 + 21
= 3
B = -15 - 8 + 9 + 13 - 11
= -15 - 11 - 8 + 13 + 9
= -34 + 22
= -12
C = -12 + 3 - 9 - 8 + 4
= -12 - 9 - 8 + 3 + 4
= -29 + 7
= -22
voila :)
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Réponse :
bonjour
A = -7 + 12 - 4 + 9 - 7
= -7 - 4 - 7 + 12 + 9
= -18 + 21
= 3
B = -15 - 8 + 9 + 13 - 11
= -15 - 11 - 8 + 13 + 9
= -34 + 22
= -12
C = -12 + 3 - 9 - 8 + 4
= -12 - 9 - 8 + 3 + 4
= -29 + 7
= -22
voila :)