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

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

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    From inequality(1)：
         x ≤ 1 或  x ≥ 3

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    The final solution set is :
         x ≤ 1 或  x ≥ 3

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