Czech crowns

Oldrich has one crown. Peter has five crowns coin, a two crown coin and a one-crown coin. Radek has twenty-crown banknote, ten banknote and five-crown coin. The boys got one fifty-one crown and one crown coin. How can they share the money fairly when they can not change the coins?

Result

x =  17 Kc

Solution:

$a = 50+1 = 51 \ \\ x = a/3 = 51/3 = 17= 17 \ \text { Kc } \ \\ O_{ 1 } = 1 \ \\ P_{ 1 } = 5+2+1 = 8 \ \\ R_{ 1 } = 20 + 10 + 5 = 35$

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