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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality ((5+x)+(-9+4x))/2 ≥-1+x .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( ( 5 + x ) + ( -9 + 4 * x ) ) / 2 ≥ -1 + x         (1)

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    From inequality(1)：
         x ≥ 2/3

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    The final solution set is :
         x ≥ 2/3

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