Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 300+21*(X-10) <25.5X .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        300 + 21 * ( X - 10 ) <25.5 * X         (1)

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    From inequality(1)：
         X ＞ 20

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    The final solution set is :
         X ＞ 20

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