a,b,c,d,e
a/5=b/6=c/10=k
a=5k
b=6k
c=10k
3c=7d=15e=m
c=m/3
d=m/7
e=m/15
10k=m/3, m=30k
a+b+c+d+e=1337
5k+6k+10k+30k/7 +2k=1337
35k+42k+70k+30+14k=7*1337
k=49
a=245
b=294
c=490
d=210
e=58
scz daca n-am detaliat suficient. te lamuresc la nevoie. smecheria e ca numarul c=10k=m/3 de unde m=30k