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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 20 <16*(14+12x)/2.4/7.5 <21 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        20 <16 * ( 14 + 12 * x ) / 2.4 / 7.5         (1)
        16 * ( 14 + 12 * x ) / 2.4 / 7.5 <21         (2)

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    From inequality(1)：
         x ＞ 0.708333
    From inequality(2)：
         x < 0.802083

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    From inequalities (1) and (2)
         0.708333 < x < 0.802083     (3)

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    The final solution set is :
         0.708333 < x < 0.802083

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