Exercice 1 Ecrire les expressions suivantes sans parentheses, puis reduire les expressions obtenues
A= 2x+4-(8x-9)
B=3a-7+(2a+5)+(3a-10)
C=3t+0,1-(4,5-6t)+[12-(3,2+t)]
A= 2x+4-(8x-9)
B=3a-7+(2a+5)+(3a-10)
C=3t+0,1-(4,5-6t)+[12-(3,2+t)]
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