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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (0.2x-1.2)/0.3-(0.12-0.1x)/0.05 <= -4 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 0.2 * x - 1.2 ) / 0.3 - ( 0.12 - 0.1 * x ) / 0.05 <= -4         (1)

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    From inequality(1)：
         x ≤ 9/10

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    The final solution set is :
         x ≤ 9/10

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