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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1600 ≥x+15×60 ≥190 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1600 ≥ x + 15 × 60         (1)
         x + 15 × 60 ≥190         (2)

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    From inequality(1)：
         x ≤ 700
    From inequality(2)：
         x ≥ -710

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    From inequalities (1) and (2)
         -710 ≤ x ≤ 700    (3)

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    The final solution set is :
         -710 ≤ x ≤ 700

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