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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 40（x-90）-40x*0.1 >= 900 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        40 * ( x - 90 ) - 40 * x * 0.1 >= 900         (1)

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    From inequality(1)：
         x ≥ 125

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    The final solution set is :
         x ≥ 125

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