easy one
apple = 10
banana(4) = 4
banana(3) = 3
coconut(2) = 2
coconut(1) = 1

coconut(1)+apple+banana(3) = 14

medium one
red apple = 30
green apple(2) = 100
green apple(1) = 50
yellow apple = 80

green apple(1) - red apple + yellow apple = 100

x*y = N

x	N	y
15	255	17
17	272	16
35	525	15

x*y = N/3

x	N	y
3	63	7
11	99	3
14	84	2