Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality (1-0.4)*19 <= (4+0.15)*X .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 - 0.4 ) * 19 <= ( 4 + 0.15 ) * x         (1)

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    From inequality(1)：
         x ≥ 2.746988

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    The final solution set is :
         x ≥ 2.746988
[ 2/2Inequality]
    Assignment:Find the solution set of inequality (1-0.35)*19 <= (4)*X .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 - 0.35 ) * 19 <= ( 4 ) * x         (1)

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    From inequality(1)：
         x ≥ 247/80

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    The final solution set is :
         x ≥ 247/80

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