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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (4/20)+(4/30)+(9/20)+(9/30)*[(10-x)/10] ≥1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 4 / 20 ) + ( 4 / 30 ) + ( 9 / 20 ) + ( 9 / 30 ) * ( ( 10 - x ) / 10 ) ≥1         (1)

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    From inequality(1)：
         x ≤ 25/9

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    The final solution set is :
         x ≤ 25/9

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