Question

irina,teodor si andrei au participat la un concurs.irina si teodor au obtinut impreuna 600 de puncte,iar irina si andrei 531 de puncte.cate puncte a obtinut fiecare copil?

Answer 1

Irina+Teodor=559;Teodor+Andrei=600;Irina+Andrei=531;
Note I -Irina, A - Andrei, T - Teodor, avem:
T=559-I = > 559-I+A=600 => A-I=41 => A=41+I => I+41+I=531 =>2I=490 => I=245;
T=559-245=314;A=41+245=286;
Irina = 245;Teodor = 314;Andrei = 286;