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Sagot :

c=(5/6+7/12)*3/5
=(10/12+7/12)*3/5
=17/12*3/5
=51/60
=17/20
c=(5/6+7/12)x3/5
c=(10/12+7/12)x3/5
c=17/12x3/5=51/60 ou 17/20

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