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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality x×2800×（565+70x) ≤1960×10000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x × 2800 × ( 565 + 70 * x ) ≤1960 × 10000         (1)

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    From inequality(1)：
         -14.819359 ≤ x ≤ 6.74793

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    The final solution set is :
         -14.819359 ≤ x ≤ 6.74793
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 70x+565 ≤2000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        70 * x + 565 ≤2000         (1)

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    From inequality(1)：
         x ≤ 41/2

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    The final solution set is :
         x ≤ 41/2

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