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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 11.7 <(23100+11.7*x)÷(1500+x) <12 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        11.7 < ( 23100 + 11.7 * x ) ÷ ( 1500 + x )         (1)
         ( 23100 + 11.7 * x ) ÷ ( 1500 + x ) <12         (2)

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    From inequality(1)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
        The solution set is empty, that is, within the range of real numbers, the inequality will never be established!

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    The final solution set is :
        The solution set is empty,that is, the inequality will never be estatlished within the real number range.

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