Răspuns :
a+b+c=55
a-10=b+10
b-5=c+5
c+20+c+5+c=55
3c+25=55
3c=55-25=30
c=30:3=10
b=10+10=20
a=20+20
a=40
Notam echipele cu :a,b si c
a+b+c=55
a-10=b+10
a=b+20
b-5=c+5
b=c+10
c=b-10,inlocuim pe a si c in prima operatie
b+20+b+b-10=55
3b+10=55
3b=55-10
b=45:3
b=15
a=15+20=35
c=15-10=5
V:35+15+5=55