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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 150x+200(2x-10) ≤9000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        150 * x + 200 * ( 2 * x - 10 ) ≤9000         (1)

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    From inequality(1)：
         x ≤ 20

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    The final solution set is :
         x ≤ 20

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