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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 9x ≤54x+-4 <12 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        9 * x ≤54 * x + -4         (1)
        54 * x + -4 <12         (2)

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    From inequality(1)：
         x ≥ 4/45
    From inequality(2)：
         x < 8/27

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    From inequalities (1) and (2)
         4/45 ≤ x < 8/27    (3)

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    The final solution set is :
         4/45 ≤ x < 8/27

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