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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -9 ≤4x+3 ≤11 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -9 ≤4 * x + 3         (1)
        4 * x + 3 ≤11         (2)

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    From inequality(1)：
         x ≥ -3
    From inequality(2)：
         x ≤ 2

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

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    The final solution set is :
         -3 ≤ x ≤ 2

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