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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （50+10x）（200-10x） >15400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 50 + 10 * x ) * ( 200 - 10 * x ) >15400         (1)

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    From inequality(1)：
         6 < x < 9

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    The final solution set is :
         6 < x < 9

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