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    4. 8n+12-5n=21 n=
    8n+12-5n=21 n=

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    0  Views: 804 Answers: 1 Posted: 12 years ago
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      1 Answer

      8n + 12 - 5n = 21


      8n -5n + 12 = 21


      3n + 12 = 21


      3n + 12 -12 = 21 -12


      3n = 9


      3n/3 = 9/3


      n=3


       

      12 years ago. Rating: 1
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