Question

Denis are de 3 ori mai putine bilete decat Stefan. Cate bilete are fiecare, daca impreuna au 12 bilete?

Answer 1

s/3 + s =12
s+3s=3*12
4s=3*12
s=3*3=9
d=s:3=9:3=3

Answer 2

$\text {Metoda~grafica~:}$

D |-----| } 12 bilete
S |-----|-----|-----|

12:4=3 bilete (un segment)

D=3 bilete
S=3×3=9 bilete