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2019年春七年级数学下册第九章不等式与不等式组周滚动练（9.1_9.3）课件（新版）新人教版.pptx

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周滚动练(9.19.3),18. ( 12分 )某自行车经销商计划投入7.1万元购进100辆A型和30辆B型自行车,其中B型车单价是A型车单价的6倍少60元. ( 1 )求A,B两种型号的自行车单价分别是多少元? ( 2 )后来由于该经销商资金紧张,投入购车的资金不超过5.86万元,但购进这批自行车的总数不变,那么至多能购进B型车多少辆?,

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