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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 16 ≤22-x/100×0.55 ≤20 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        16 ≤22 - x / 100 × 0.55         (1)
        22 - x / 100 × 0.55 ≤20         (2)

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    From inequality(1)：
         x ≤ 12000/11
    From inequality(2)：
         x ≥ 4000/11

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    From inequalities (1) and (2)
         4000/11 ≤ x ≤ 12000/11    (3)

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    The final solution set is :
         4000/11 ≤ x ≤ 12000/11

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