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trei copii au adunat impreuna 900 de nuci Stiind ca primi doi au impreuna 617 nuci,iar ultimi doi 602 Afla cate nuci aadunat ficare?

Răspuns :

a+b+c=900 a+b=617 b+c=602 617+c=900 c=900-617 c=283 B+283=602 b=602-283 B=319 A+319=617 A=617-319 A=298 298+318+283=900 Coroniță ?
900-617=283  nuci are 3 copil
900-602=298 nuci are 1 copil
283+298=581
900-581=319 nuci are 2 copil