Alexandra+Teodor+Andrei=81;Alexandra = 3+Teodor;Teodor = Andrei-6 => Andrei = Teodor+6;
Inlocuim Alexandra si Teodor in prima relatie:
3+Teodor+Teodor+Teodor+6=81;3*Teodor=72;Teodor=72/3=24 => Teodor a primit 24 nuci.Alexandra = 3+24=27;Andrei = 24+6=30;