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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality ((X-1200)/2000+1)*((X-1599)/15*115+900+2800+1400) >= 6500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( ( X - 1200 ) / 2000 + 1 ) * ( ( X - 1599 ) / 15 * 115 + 900 + 2800 + 1400 ) >= 6500         (1)

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    From inequality(1)：
         X ≤ -1497.446481

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    The final solution set is :
         X ≤ -1497.446481

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