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    8n+12-5n=21 n=

    0  Views: 789 Answers: 1 Posted: 12 years ago

    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


     



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