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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (2.19+x)(67.81-x) <60 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 2.19 + x ) * ( 67.81 - x ) <60         (1)

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    From inequality(1)：
         x < -1.322096 或  x ＞ 66.942096

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    The final solution set is :
         x < -1.322096 或  x ＞ 66.942096

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