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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1.691*(1.15+(2.78*x）/(x+1400)) ≤1.816*(2.78*x/(1400+x)) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1.691 * ( 1.15 + ( 2.78 * x ) / ( x + 1400 ) ) ≤1.816 * ( 2.78 * x / ( 1400 + x ) )         (1)
        From the definition field of divisor
         x + 1400 ≠ 0        (2 )
        From the definition field of divisor
         1400 + x ≠ 0        (3 )

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    From inequality(1)：
         x ≥ -1704.605078
    From inequality(2)：
         x < -1400 或  x ＞ -1400
    From inequality(3)：
         x < -1400 或  x ＞ -1400

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    From inequalities (1) and (2)
         -1704.605078 ≤ x < -1400 或  x ＞ -1400    (4)
    From inequalities (3) and (4)
         -1704.605078 ≤ x < -1400 或  x ＞ -1400    (5)

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    The final solution set is :
         -1704.605078 ≤ x < -1400 或  x ＞ -1400

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