Question for you all from AMK test!

I was doing AMK test today and there was one funny, but hard mathematic question.


Man with sheeps goes from 3 customs A, B and C in each custom they take half of his sheeps, but on every custom they give 1 sheep back. After C custom man has 12 sheeps left. How much sheep he had at the begining and after A and B?
Comments
6
12 -1 *2 = 22
22-1 *2 = 42
41-1 *2 = 82
?
82 at the beginning, 42 after A and 22 after B.
Damm we have smart people here :D
Took me one fucking hour to do that xDDD I was so confused.
82
42
22
I have the same results...
Not enouth info given to solve it...
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