Bonjour, Enlever les parenthèses et reduire
a= 3a+5-(2a+7)+(8-5a)
b=-b+4+(3b-2)-(8b-5)
c=6-5c+3c-(4-6c)+5+(7-2c)
d= d-1-(3d+4)+(5-4d)-(7d+5)+5
a= 3a+5-(2a+7)+(8-5a)
b=-b+4+(3b-2)-(8b-5)
c=6-5c+3c-(4-6c)+5+(7-2c)
d= d-1-(3d+4)+(5-4d)-(7d+5)+5
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