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daca a/b=3/8, aflati valoarea raportului 5a+7b/2b+3a

Răspuns :

a/b=3/8 =>a=3b/8
[5(3b/8)+7b]/[2b+3(3b/8)]=(15b/8+7b)/(2b+9b/8)=(15b+56b)/(16b+9b)=71b/25b=71/25=2 intregi 21/25