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Impatrtiti numarul 63 in trei numere invers proportionale cu numerele 3;5si 6

Răspuns :

a=k/3
b=k/5
c=k/6
a+b+c=63
k/3+k/5+k/6=63
10k+6k+5k=1890
21k=1890
k=1890:21=90

a=k/3=90/3=30
b=k/5=90/5=18
c=k/6=90/6=15