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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (15+x)(180000-2000x) >2700000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 15 + x ) * ( 180000 - 2000 * x ) >2700000         (1)

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    From inequality(1)：
         0 < x < 75

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    The final solution set is :
         0 < x < 75

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