Răspuns :
a/2=b/4=c/7=k ⇒ a=2k, b=4k, c=7k; c-a=5k=60, k=12;
a=2k=24, b=4k=48, c=7k=84.
a=2k=24, b=4k=48, c=7k=84.
a/2=b/4=c/7=k a=2k b=4k c=7k 7k-2k=60 5k=60 k=12 a=24 b=48 c=84