Răspuns:
fiecare cutie conține acelaşi număr de bomboane
Anca are 6 cutii
Cornelia are 3 cutii
[tex]30+31+32+33+34=160-bomboane-Anca\\\\39+40+41=120-bomboane-Cornelia\\\\(160-x)/5=(120-x)/3\\\\numitor. comun- 15\\\\480-3x=600-5b\\\\2x=600-480= > x=60-zile\\\\((120+160)-2*60]:8=(280-120):8=20 -bomboane .contine.o.cutie[/tex]