Question

Daca Tina ii da surorii sale,Nana, 3 cd-uri,amandoi vor avea acelasi nr. de CD-URI!Cate cd-uri are fiecare,daca impreuna au 32 de cd-uri?

Answer 1

t+n=32
t-3=n+3
t-6=n
t=6+n
6+n+n=32
2n=32-6
n=26:2
n=13 cd-uri.... NANA
Tina= 13+3+3=19 cd-uri