Răspunsuri

Cel mai inteligent răspuns!
2014-10-12T10:35:11+03:00
(a+2b+c)+ (2a+b+2c) =51+42=93  
3a+3b+3c=93 
3(a+b+c)=93  
(a+b+c)=93:3  
(a+b+c)=31
1 5 1