1. 

   math_celebrity Administrator Staff Member

   12 is subtracted from d and the result is tripled.
   
   12 is subtracted from d:
   d - 12
   
   The result is tripled means we multiply d - 12 by 3
   3(d - 12)
   
   

    

   math_celebrity, Oct 12, 2021

   #1
   
   

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