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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 100 <8.5x+6(15-x) ≤120 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        100 <8.5 * x + 6 * ( 15 - x )         (1)
        8.5 * x + 6 * ( 15 - x ) ≤120         (2)

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    From inequality(1)：
         x ＞ 4
    From inequality(2)：
         x ≤ 12

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    From inequalities (1) and (2)
         4 < x ≤ 12     (3)

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    The final solution set is :
         4 < x ≤ 12

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