Răspuns:
a+b+c=190
2a/100=10b/100=25c/100 simplificam fractiile
a/5=b/10=c/4=k
a=5k
b=10k
c=4k
5k+10k+4k=190
19k=190=>k=190:19=>k=10
a=5·10=50
b=10·10=100
c=10·4=40