numarul de bomboane le notez cu a
AURA IA a/4 raman 3a/4
Bogdan ia 1/3 din 3a/4 deci a/4
Cristina ia 1/2 (a-a/4-a/4)=a/4
raman in cutie 4 bomboane deci 4=a/4 a=16 bomboane au fost 16
verificare Aura ia 4 raman 12 Bogdan ia tot 4 raman 8 Cistina ia 4 raman 4 corect