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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 78x ≥-30 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        78 * x ≥ -30         (1)

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    From inequality(1)：
         x ≥ -0.384615

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    The final solution set is :
         x ≥ -0.384615
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 50x ≤-30 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        50 * x ≤ -30         (1)

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    From inequality(1)：
         x ≤ -3/5

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    The final solution set is :
         x ≤ -3/5

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