cantitatea de porumb x
animale 2· x /9 ramane x - 2·x /9 = 9·x /9 - 2·x /9 = 7·x /9
vinde 2/3 · 7x /9 = 14·x /27 ramas 7·x /9 - 14x /27 =
=( 21x -14x) / 27 = 7x /27
insamantari 3/5· 7x /27 = 21x / 135
ramas 7x /27 - 21x / 135 = ( 35x - 21x) /135 =
= 14x /135 = 28 q / : 14
x /135 = 2q
x = 135· 2q = 270 q