poate asa il va ajuta
6 vaci.......2oi......256 kg inmultesc cu 5
9 vaci.......5 oi.....400kg inmultesc cu 2
5×6vaci......5×2 oi....5×256kg
2×9vaci......2×5 oi....2×400kg
30vaci........10 oi......1280kg
18 vaci........10oi......800kg scad sistemul
30vaci-18vici....10 oi-10 oi.....1280kg-800kg
12vaci.....................................480kg
aflam cat consuma o vcaca
480:12=40kg
o vaca=40 kg nutret
acum
daca o vaca comsuma 40kg nutret
aflam cat nuter consuma 6 vaci
40 ori 6=240kg
240kg........2oi........256kg
2oi=256kg-240kg
2oi=16kg
aflam cate kg nutret consuma o oaie
16:2=8 kg nutret