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Which of the following is the sum of possible value of X, for |x+2|=2|x-2|?
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a. x>=2ʱ£¬x£½6£»
b. -2<=x<2ʱ£¬x=2/3;
c. x<=-2ʱ£¬x£½6£¬²»ÕýÈ·£¬
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