5) o+g+s=4680kg.cereale
o+g=3800kg
g+s=2900kg
------------------------------------
o=?kg.; g=?kg.;s=?kg
3800+s=4680kg
s=4680-3800
s=880kg. (secara)
o+2900=4680kg.
o=4680-2900
o=1780kg. (orz)
1780+g+880=4680kg
g=4680-(1780+880)
g=4680-2660
g=2020kg. (grau)
1780+2020+880=
=3800+880
=4680kg.cereale
6) (19+13)*2=
=32*2
=64 cartofi ( de curatat in total)