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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 80(20-x)+96x >= 1800 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        80 * ( 20 - x ) + 96 * x >= 1800         (1)

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    From inequality(1)：
         x ≥ 25/2

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    The final solution set is :
         x ≥ 25/2

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