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Three times the result of subtracting a certain number from 7 gives the same answer as adding eleven to the number. find the number
 Mar 8, 2012
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Three times the result of subtracting a certain number from 7 gives the same answer as adding eleven to the number. find the number     

 

     x + 11  =  3 (7 – x)     

     x + 11  =  21 – 3x     

   4x + 11  =  21     

           4x  =  10     

             x  =  2.5     

 

   check answer     

 

     x + 11  =  3 (7 – x)     

  2.5 + 11  =  3 (7 – 2.5)     

        13.5  =  3 • 4.5     

        13.5  =  13.5   True     

   .     

 Apr 26, 2026

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