Question

clasa a lll a Tudor ,Razvan si Costi au impreuna 197 de timbre.Tudor si Razvan au impreuna 125 de timbre, iar Razvan si Costi 130 de timbre .Cate timbre are fiecare?

Answer 1

T+R=125
125+C=197
C=72
R+C=130
T+130=197
T=67
T+C=67+72=139
139+R=197
R=56

Answer 2

T,R,C-numbarul de timbre al fiecaruia T+R+C=197 T+R=125=>C=197-(T+R)=72 R+C=130=>T=67 T+R+C=197=>R=197-(67+72)=58