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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 4     Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        4 < abs ( 1 - 3 * x )         (1)
         abs ( 1 - 3 * x ) ≤7         (2)

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    From inequality(1)：
         x < -1 或  x ＞ 5/3
    From inequality(2)：
         -2 ≤ x ≤ 8/3

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    From inequalities (1) and (2)
         -2 ≤ x < -1 或  5/3 < x ≤ 8/3     (3)

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    The final solution set is :
         -2 ≤ x < -1 或  5/3 < x ≤ 8/3

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