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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 20Z+15(10-Z) ≥190 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        20 * Z + 15 * ( 10 - Z ) ≥190         (1)

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    From inequality(1)：
         Z ≥ 8

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    The final solution set is :
         Z ≥ 8

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