Question 1116496
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<pre>
Jane, Susan and Lilly have 4x, 7x and 5x dollars, respectively, where x is some unknown amount of dollars.


The condition says

4x + 15 = 7x - 15,


which implies

15 + 15 = 7x - 4x,   or

30 = 3x  ====>  x = {{{30/3}}} = 10 dollars.


<U>Answer</U>.  Lilly has 5*10 = 50 dollars.
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Solved.