f +a+m = 84 kg, f = fragi, a = affine, m = mure
f = 1/5 x a
m = 3x a
a |__|__|__|__|__|
f |__|
m |__|__|__|__|__|__|__|__|__|__|__|__|__|__|__|
avem 21 segmente egala
84:21 = 4 kg = f
a = 4x5 = 20 kg
m = 20 x 3 = 60 kg
20.7 kg mere + 9 kg prune = 55 lei
7 kg mere + 4 kg prune = 40 lei
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5 kg prune = 15 lei
1 kg prune = 15:5 = 3 lei
7 kg mere + 12 lei = 40 lei
7 kg mere = 40-12 = 28 lei
1 kg mere = 28:7 = 4 lei
