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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 9.9*1000y-(7×1000y)-(20-y)×7×1000 >= 1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        9.9 * 1000 * y - ( 7 × 1000 * y ) - ( 20 - y ) × 7 × 1000 >= 1         (1)

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    From inequality(1)：
         y ≥ 46667/3300

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    The final solution set is :
         y ≥ 46667/3300

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