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在经济学中，供给 S(p) = 10p - 50 ，需求 D(p) = 200 - 5p 。均衡价格？（答： p = (50)/(3) 。）
在经济学中，供给 S(p) = 10p - 50 ，需求 D(p) = 200 - 5p 。均衡价格？（答： p = (50)/(3) 。）
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