Overview: 3 questions will be solved this time.Among them
           ☆3 inequalities

[ 1/3Inequality]
    Assignment:Find the solution set of inequality x1+x2 ≤300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * 1 + x * 2 ≤300         (1)

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    From inequality(1)：
         x ≤ 100

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    The final solution set is :
         x ≤ 100
[ 2/3Inequality]
    Assignment:Find the solution set of inequality 2x1+x2 ≤400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * x * 1 + x * 2 ≤400         (1)

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    From inequality(1)：
         x ≤ 100

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    The final solution set is :
         x ≤ 100
[ 3/3Inequality]
    Assignment:Find the solution set of inequality x2 ≤250 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * 2 ≤250         (1)

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    From inequality(1)：
         x ≤ 125

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    The final solution set is :
         x ≤ 125

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