Question 624199
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Hi,
three digit number {{{highlight(xyz)}}} 
 My hundreds digit is 4 more than my ones digit, and my tens digit is their difference.
Question states***
  x = z + 4    or x - z = 4
  y = x - z
  y = 4
If... I am understanding Your question properly, several numbers would work:
 440,541, 642, 743, 844, and 945