Three colleagues

Three colleagues divided the proceeds from an investment fairly according to the size of their contributions.
Bohumil received twice less than Olívie and at the same time 4,000 CZK more than Jan. Olivia received 10,000 CZK. What was the total return on the investment?

Final Answer:

x =  16000 Kc

Step-by-step explanation:

$$\begin{gathered} O=10000\text{Kc} \\ B=O/2=10000/2=5000\text{Kc} \\ B=4000+J \\ J=B-4000=5000-4000=1000\text{Kc} \\ x=O+B+J=10000+5000+1000=16000\text{Kc} \end{gathered}$$

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