Notam
x- cat a cules un baiat
y- cat a cules o fata
11x+28y=814 ⇒x=(814-28y)/11
22x+12y=660
22(814-28y)/11+12y=660
2(814-28y)+12y=660
1628 - 56y+12y=660
1628-44y=660
1628-660=44y
968=44y
y=968/44= 22 kg
x=(814-28y)/11=(814-28*22)/11=(814-616)/11=198/11=18 kg
1 băiat a cules 18 kg
1 fată a cules 22 kg
Fetele sunt mai harnice.