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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (25＋x)×【80000-2000×(x-25)】 ≥2000000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 25 + x ) × ( 80000 - 2000 × ( x - 25 ) ) ≥2000000         (1)

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    From inequality(1)：
         -12.015621 ≤ x ≤ 52.015621

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    The final solution set is :
         -12.015621 ≤ x ≤ 52.015621

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