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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (45-40)a+(60-50)(200-a) ≤1600 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 45 - 40 ) * a + ( 60 - 50 ) * ( 200 - a ) ≤1600         (1)

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    From inequality(1)：
         a ≥ 80

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    The final solution set is :
         a ≥ 80

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