Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 300 <5m+4 <400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        300 <5 * m + 4         (1)
        5 * m + 4 <400         (2)

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    From inequality(1)：
         m ＞ 296/5
    From inequality(2)：
         m < 396/5

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    From inequalities (1) and (2)
         296/5 < m < 396/5     (3)

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    The final solution set is :
         296/5 < m < 396/5
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 300 <3n+2 <400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        300 <3 * n + 2         (1)
        3 * n + 2 <400         (2)

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    From inequality(1)：
         n ＞ 298/3
    From inequality(2)：
         n < 398/3

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    From inequalities (1) and (2)
         298/3 < n < 398/3     (3)

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    The final solution set is :
         298/3 < n < 398/3

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