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Daca a/8=b/3 aflari valoarea raportului a+b/2a+3b

Răspuns :

a/8=b/3=k <=> a=8k si b=3k => (a+b)/(2a+3b)=(8k+3k)/(2•8k+3•3k)= 11k/(16k+9k)=11k/25k=11/25