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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.9*1263.15*10^6 ≤22.4*990*x*（820-0.5x） .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.9 * 1263.15 * 10 ^ 6 ≤22.4 * 990 * x * ( 820 - 0.5 * x )         (1)

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    From inequality(1)：
         x ≥ 65.101602

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    The final solution set is :
         x ≥ 65.101602

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