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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality [60（1+0.5x）-40(1+x)]1000(1+0.8x) >2000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 60 * ( 1 + 0.5 * x ) - 40 * ( 1 + x ) ) * 1000 * ( 1 + 0.8 * x ) >2000         (1)

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    From inequality(1)：
         -1.171165 < x < 1.921165

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    The final solution set is :
         -1.171165 < x < 1.921165

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