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    3. 8n+12-5n=21
    8n+12-5n=21

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    0  Views: 1431 Answers: 2 Posted: 11 years ago
    Tags: algebra problem algebra homework
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      2 Answers

      8n+12-5n=21


      8n-5n+12-21=0


      3n-9=0


      3n=9


      n=9/3


      n=3

      11 years ago. Rating: 3
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        8n + 12 - 5n = 21


        combine like term


         8n - 5n = 3n


        3n + 12 = 21


        subtract 12 on both sides


        3n + 12 - 12 = 21 - 12


        3n = 9


        divide by 3 on both sides


        3n/3 = 9/3


        n = 3

        11 years ago. Rating: 0
        Comment this answer



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