1. 

   math_celebrity Administrator Staff Member

   15 minus twice a equals b
   
   Twice a means we multiply a by 2:
   2a
   
   15 minus 2a:
   15 - 2a
   
   Set this equalto b:
   15 - 2a = b

    

   math_celebrity, Sep 24, 2019

   #1
   
   

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