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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 270 ≤1800-26(50-x)-35x ≤300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        270 ≤1800 - 26 * ( 50 - x ) - 35 * x         (1)
        1800 - 26 * ( 50 - x ) - 35 * x ≤300         (2)

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    From inequality(1)：
         x ≤ 230/9
    From inequality(2)：
         x ≥ 200/9

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    From inequalities (1) and (2)
         200/9 ≤ x ≤ 230/9    (3)

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    The final solution set is :
         200/9 ≤ x ≤ 230/9

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