Question 1110373
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Alan got 2 elementary parts (2x);

Bill got 4 elementary parts (4x);

Carl got 7 elementary parts (7x).



7x - 4x = 27

3x = 27  ====>  x = {{{27/3}}} = 9.



Alan got $9*2 = $18;

Bill got $9*4 = $36;

Carl got $9*7 = $63.
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