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Hi,
The sum of three numbers is 79 the second number is 9 times the first
and the third number is three more than the second
 1st  x
 2nd is 9x
 3rd is 9x + 3
Question states***
   x + 9x + 9x + 3 = 79
             19x = 76
               x = 4, the 1st number
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