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Sagot :

MAHAM

Bonjour

A = 4/3 -2/5 (tu dois simplement tout rendre au même dénominateur)  

A =(4*5-2*3)/(3*5)

A =(20-6)/15

A = 14/15

B = 4/3 +2/5

B = (20+6)/15

B = 26/15

C = A/B

C =(14/15)/(26/15)

C =(14/15)*(15/26)

C =(14*15)/(15*26)

C =(210)/(390)

C =7/13

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