Răspuns:
mere+pere+gutui=81 kg
mere|..........|...........|
pere|...........|
gutui|..........|.........|............|.........|.........|..........|
aflam kg de pere:
81:9=9kg
aflam kg de mere
9×2=18kg
aflam kg de gutui
18×3=54 kg
v:9+18+54=81kg
corect