在“城乡清洁工程”中，某环卫队租来若干辆载重量为8吨的汽车运一批建筑垃圾，若每辆只装4吨，则剩下20吨建筑垃圾；若每辆汽车装满8吨，则最后一辆车不满也不空．该环卫队租了多少辆汽车？
人气：447 ℃ 时间：2020-04-04 05:43:21
解答
设有x辆车，则有（4x+20）吨货物．
由题意，得0＜（4x+20）-8（x-1）＜8，
解得5＜x＜7．
∵x为正整数，
∴x=6．
答：该环卫队租了6辆汽车．
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