1. 

   math_celebrity Administrator Staff Member

   1/2 of the parent age is 34/2 = 17.
   
   9 less than that is 17 - 9 = 8.
   
   The son is 8 years old.
   
   You can also write this as 1/2(34) - 9 --> 17 - 9 = 8.

    

   math_celebrity, Aug 31, 2016

   #1
   
   

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