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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -3 <= 5-2*x <= 7 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -3 <= 5 - 2 * x         (1)
         5 - 2 * x <= 7         (2)

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    From inequality(1)：
         x ≤ 4
    From inequality(2)：
         x ≥ -1

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    From inequalities (1) and (2)
         -1 ≤ x ≤ 4    (3)

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    The final solution set is :
         -1 ≤ x ≤ 4

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