February 2021 0 56 Report
Bonjour, aidez moi svp !! Supprimer les parenthèses, puis réduire :

a) 4a - (-5 + a)
b) -1 + (-3x + 4)
c) -3b + 4 + (-b - 5)
d) 5 - 2y - (7 - 4y)
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