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Dan,Ana si Mirela au impreuna 3455 lei Dan si Ana au 2378 lei iar Ana si Mirela au 2368 lei. Afla cati bani are fiecare copil?

Răspuns :

D+A+M=3455
D+A=2378
A+M=2368
2378+M=3455,M=3455-2378,M=1077
A+M=2368,A+1077=2368,A=2368-1077,A=1291
D+A=2378,D+1291=2378,D=2378-1291,D=1087
Unde A=Ana
D=Dan
M=Mirela