Question 1197384
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After reading the problem, we write this

   H + L + D = 122  dollars.


Then we replace L with H/2 and replace D with (H-3) - - - the reasons why we do it are clear.


Then the equation takes form

    H + H/2 + (H-3) = 122.


Next you multiply everything by 2 and simplify step by step

    2H + H + 2H - 6 = 244

         5H         = 250

          H         = 250/5 = 50.


Thus we learned that Huey has 50 dollars.


From this point, complete the rest on your own.
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Solved, with pretty full explanations.