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March 30, 2017

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4<1+n/7

  • algebra - ,

    4 < 1 + n /7 Multiply both sides by 7

    28 < 7 + n Subtract 7 to both sides

    28 - 7 < 7 + n - 7

    21 < n

    This is equivalent of :

    n > 21

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