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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （60－40)a＋(60×0.7－40)（50－a）＋(88－48)×50 ≥2370 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 60 - 40 ) * a + ( 60 × 0.7 - 40 ) * ( 50 - a ) + ( 88 - 48 ) × 50 ≥2370         (1)

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    From inequality(1)：
         a ≥ 15

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    The final solution set is :
         a ≥ 15

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