Question 1171557
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The difference of purchases is 5 student tickets (5 = 7-2) and  (63-38) = 25 dollars.


Hence, the price of one student ticket is 25/5 = 5 dollars.


Then the price of one adult tickets is  {{{(63-7*5)/7}}} = 4 dollars.
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Solved &nbsp;&nbsp;// &nbsp;&nbsp;Mentally.


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Post-solution notices.


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    1.   This problem is a typical example when a MENTAL solution is expected (and required, by DEFAULT).


    2.  The answer seems to be strange, because usually student tickets are cheaper than adult tickets.

        But here I can nothing to do, because the input data of the problem LEADS with NECESSITY to this answer.
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