9
nu=nectarine
k=kiwi
9n...............6k.............87lei-
5n...............6k.............67lei
_____________________
4n................................20 lei
n=20:4
n=5 lei/kg nectarine
5*9+6*x=87
45+6x=87
6x=87-45
6x=42 lei
x=42:6
x=7 lei kg de kiwi
proba
9*5+6*7=45+42=87lei
