Question

Tudor,Razvan si Costi au impreuna 197 de timbre.Tudo si Razvan au impreuna 125 de timbre iar razvan si costi 130 de timbre.Cate timbre are fiecare?

Answer 1

t+r+c=197
t+r=125
r+c=130
125+c=197
c=197-125
c=72-->Costi are 72 de timbre
r+c=130
r+72=130
r=58-->Razvan are 58 de timbre
t+r=125
t+58=125
t=67-->Tudor are 67 timbre