The prize is $ x.
The first person (Alex) gets half of what the second person (Beatrice) gets.
Let's assume Alex gets $ P.
Beatrice gets double what Alex gets. So, Beatrice gets $ 2P.
The third person (Charlie) gets twice as much as the second person (Beatrice).
If Beatrice gets $ 2P, then Charlie gets $ 2P x 3 (which is equal to $ 6P).
x = P + 2P... more
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