bonsoir
A = 7 + 8 - 16 = 15 - 16 = - 1
b = - 8 - 9 + 7 = - 17 + 7 = - 10
C = 4 - 9 + 13 = 17 - 9 = 8
D = - 2 + 6 - 3 = 6 - 5 = 1
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bonsoir
A = 7 + 8 - 16 = 15 - 16 = - 1
b = - 8 - 9 + 7 = - 17 + 7 = - 10
C = 4 - 9 + 13 = 17 - 9 = 8
D = - 2 + 6 - 3 = 6 - 5 = 1