Question

Irina,Teodor si Andrei au participat la un concurs.Irina si Teodor au obtinut impreuna 559 de puncte,Teodor si Andrei au impreuna 600 de puncte,iar Irina si Andrei au impreuna 531 de puncte.Cate puncte a obtinut fiecare copil?

Answer 1

I + T = 559

T + A = 600

I + A = 531

I = ? T = ? A = ?

I + T + T + A = 559 + 600 .

I + 2T + A = 1159

2T + 531 = 1159

2T = 1159 - 531

2T = 628

T = 628 : 2

T = 314

I + 314 = 559

I = 559 - 314

I = 245

245 + A = 531

A = 531 - 245

A = 286

Answer 2

i+t=559=>t=559-i
t+a=600=>559-i+a=600=>a=600-559+i=>a=41+i
i+a=531=>i+41+i=531=>2i=490=>i=245
245+a=531=>a=286
t=600-286=>t=314