18 fete.......12 baieti... 1 140 kg mere
16 fete........12 baieti....1 060 kg mere
____________________________ ( - )
2 fete..............//..............80 kg mere
1 fata = 80:2 = 40 kg mere
1 baiat = [1 140-(18×40)]:12 =
= (1 140-720):12 =
= 420:12 = 35 kg mere
40kg mere a cules o fata
35 kg mere a cules un baiat