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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 18.5 ≤(2x-200)/2x ≤23.9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        18.5 ≤ ( 2 * x - 200 ) / 2 * x         (1)
         ( 2 * x - 200 ) / 2 * x ≤23.9         (2)

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    From inequality(1)：
         x ≤ -0.184659 或  x ≥ 100.184659
    From inequality(2)：
         -0.238432 ≤ x ≤ 100.238432

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    From inequalities (1) and (2)
         -0.238432 ≤ x ≤ -0.184659 或  100.184659 ≤ x ≤ 100.238432    (3)

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    The final solution set is :
         -0.238432 ≤ x ≤ -0.184659 或  100.184659 ≤ x ≤ 100.238432

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