Răspuns :
a+b+c=590
b=21/2a=5/2a
a+5/2a=7/2a
c=3/7*7/2a=3/2a
a+5/2a+3/2a=590
2a+5a+3a=590
10a=1180
a=118
b=5/2*118=295
c=3/2*118=177
118+295+177=590
b=21/2a=5/2a
a+5/2a=7/2a
c=3/7*7/2a=3/2a
a+5/2a+3/2a=590
2a+5a+3a=590
10a=1180
a=118
b=5/2*118=295
c=3/2*118=177
118+295+177=590