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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1.6x+0.4(20-x) <= 17.6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1.6 * x + 0.4 * ( 20 - x ) <= 17.6         (1)

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    From inequality(1)：
         x ≤ 8

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    The final solution set is :
         x ≤ 8

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