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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 100*120+(150-m)(300-120) ≥31800 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        100 * 120 + ( 150 - m ) * ( 300 - 120 ) ≥31800         (1)

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    From inequality(1)：
         m ≤ 40

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    The final solution set is :
         m ≤ 40

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