Question

Mihai si Bogdan au construit colivii pentru pasari.Daca asaza cate 3 pasari in cate o colivie,ramane o pasare fara colivie,iar daca asaza cate 5 pasari
atunci raman 2 colivii goale,iar o colivie cu numai 2 pasari.
Cate pasari si colivii au Mihai si Bogdan impreuna?

Answer 1

3c+1
5c-2+1=5(c-3)+2
3c+1=5c-15+2
5c-3c=15+1-2
2c=14
c=14:2
c=7 colivii
3c+1=3x7+1=21+1=22 păsări
5c-15+2=5x7-15+2=35-15+2=20+2=22 pasari