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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.3n+0.8(100-n) <= 50 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.3 * n + 0.8 * ( 100 - n ) <= 50         (1)

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    From inequality(1)：
         n ≥ 60

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    The final solution set is :
         n ≥ 60

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