聪聪整理书柜时发现书的本数正好是上层书的4倍,他从下层书架中取出18本放入上层书架后,两层书的本数正好相等.你知道书架的上、下层原来各有多少本书吗
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![聪聪整理书柜时发现书的本数正好是上层书的4倍,他从下层书架中取出18本放入上层书架后,两层书的本数正好相等.你知道书架的上、下层原来各有多少本书吗](/uploads/image/z/2710805-5-5.jpg?t=%E8%81%AA%E8%81%AA%E6%95%B4%E7%90%86%E4%B9%A6%E6%9F%9C%E6%97%B6%E5%8F%91%E7%8E%B0%E4%B9%A6%E7%9A%84%E6%9C%AC%E6%95%B0%E6%AD%A3%E5%A5%BD%E6%98%AF%E4%B8%8A%E5%B1%82%E4%B9%A6%E7%9A%844%E5%80%8D%2C%E4%BB%96%E4%BB%8E%E4%B8%8B%E5%B1%82%E4%B9%A6%E6%9E%B6%E4%B8%AD%E5%8F%96%E5%87%BA18%E6%9C%AC%E6%94%BE%E5%85%A5%E4%B8%8A%E5%B1%82%E4%B9%A6%E6%9E%B6%E5%90%8E%2C%E4%B8%A4%E5%B1%82%E4%B9%A6%E7%9A%84%E6%9C%AC%E6%95%B0%E6%AD%A3%E5%A5%BD%E7%9B%B8%E7%AD%89.%E4%BD%A0%E7%9F%A5%E9%81%93%E4%B9%A6%E6%9E%B6%E7%9A%84%E4%B8%8A%E3%80%81%E4%B8%8B%E5%B1%82%E5%8E%9F%E6%9D%A5%E5%90%84%E6%9C%89%E5%A4%9A%E5%B0%91%E6%9C%AC%E4%B9%A6%E5%90%97)
聪聪整理书柜时发现书的本数正好是上层书的4倍,他从下层书架中取出18本放入上层书架后,两层书的本数正好相等.你知道书架的上、下层原来各有多少本书吗
聪聪整理书柜时发现书的本数正好是上层书的4倍,他从下层书架中取出18本放入上层书架后,
两层书的本数正好相等.你知道书架的上、下层原来各有多少本书吗
聪聪整理书柜时发现书的本数正好是上层书的4倍,他从下层书架中取出18本放入上层书架后,两层书的本数正好相等.你知道书架的上、下层原来各有多少本书吗
18+18=36(本)
4-1=3
下层:36/3=12(本)
上层:12*4=48(本)
答:.
18*4=72本
设原来上层书架的书为X本。4X-18=X+18 4X-X=18+18 3X=363X÷3=36÷3 x=1212×4=48(本)答:上层有12本,下层有48本。
18+18=36(本)
4-1=3
下层:36/3=12(本)
上层:12*4=48(本)
答: 。评论 | 给力1不给力1F.context('answers')['1574691267'] = {uid:"1041251974",imId:"863ed4d9bbbbb2bbc8e7d5e2b8f6bac3103e",id:"157469...
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18+18=36(本)
4-1=3
下层:36/3=12(本)
上层:12*4=48(本)
答: 。评论 | 给力1不给力1F.context('answers')['1574691267'] = {uid:"1041251974",imId:"863ed4d9bbbbb2bbc8e7d5e2b8f6bac3103e",id:"1574691267",userName:"再换不如这个好",userNameEnc:"%D4%D9%BB%BB%B2%BB%C8%E7%D5%E2%B8%F6%BA%C3",user:{sex:"1",iconType:"6",gradeIndex:"2",grAnswerNum:"3",carefield: [{cid:"1094",cname:"英语翻译"},{cid:"983",cname:"数学"},{cid:"986",cname:"生物学"}],isAuth:"0",authTitle:"",isUserAdmin:"0",userAdminLevel:"",userAdminTitle:"",isFamous:"0",isMaster:"0",goodRate:"50"},isAnonymous:"0",isCurrentUser:"0",mapUrl:"",refer:"",replyAskNum:"",threadId:"6298765069",hasComment:"0",qid:"1765867785475819740",raid:"",recommendCanceled:"0"};
F.context('answers')['1574691267']['c_timestamp'] = '1389266579';
F.context('user')['highQualityNum'] = '0';2014-01-09 19:22 再换不如这个好 | 二级 设原来上层书架的书为X本。4X-18=X+18 4X-X=18+18 3X=363X÷3=36÷3 x=1212×4=48(本)答:上层有12本,下层有48本。评论 | 给力2不给力1F.context('answers')['1574667266'] = {uid:"808726930",imId:"9231d1a9d2b9c3d4d7d93430",id:"1574667266",userName:"雪夜迷踪",userNameEnc:"%D1%A9%D2%B9%C3%D4%D7%D9",user:{sex:"1",iconType:"6",gradeIndex:"1",grAnswerNum:"1",isAuth:"0",authTitle:"",isUserAdmin:"0",userAdminLevel:"",userAdminTitle:"",isFamous:"0",isMaster:"0",goodRate:"33"},isAnonymous:"0",isCurrentUser:"0",mapUrl:"",refer:"",replyAskNum:"",threadId:"6298669065",hasComment:"0",qid:"1765867785475819740",raid:"",recommendCanceled:"0"};
F.context('answers')['1574667266']['c_timestamp'] = '1389264811';
F.context('user')['highQualityNum'] = '0';2014-01-09 18:53 雪夜迷踪 | 一级 最快回答18*4=72本
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上层:12下层:48