Răspuns:
6baieti.................7 fete..............90kg
3baieti.................7fete................66kg.
aflam diferenta dintre baieti
6-3=3
aflam cat au cules cei trei baieti
90-66=24kg
aflam cat culege un baiat
24:3=8kg
aflam cate kg culeg 7 fete
66-24=42kg
aflam cat culege o fata
42:7=6kg
v:(3×8)+(6×7)=24+42=66kg .
R:un baiat ___8kg,o fata----6 kg