Question

Daca Tin ii da surorii sale,Nana,3 CD-uri,amandoi vor avea acelasi numar de CD-uri.Cate CD-uri are fiecare,daca impreuna au 32 de CD-uri? Va rog!!!

Answer 1

[tex]x=CD\ are\ Tin\\y=CD\ are\ Nana\\ \left \{ {{x-3=y+3} \atop {x+y=32}} \right. \\ x=y+6\\2y=32-6\\y=\frac{26}{2}\\y=13\\x=32-13\\x=19[/tex]

Answer 2

1. Aflam cate CD-uri ar avea unul dintre ei daca Tin i-ar da 3 CD-uri surorii sale
32:2=16
2. Aflam cate CD-uri are Tin
16+3=19
3. Aflam cate CD-uri are Nana
16-3=13
Verificare:19+13= 32