Réponse :
A=8x+12x= 20x
C=12a+7a-3a= 16a
B =15,8y-5y= 10,8y
D=25,5b+79b-4,5b= 100b
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Réponse :
A=8x+12x= 20x
C=12a+7a-3a= 16a
B =15,8y-5y= 10,8y
D=25,5b+79b-4,5b= 100b