浓度问题6
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/08/18 20:06:00
把3千克水加到盐中得到浓度为百分之十的盐水,再把1千克盐加到所得到的盐水中,这时盐水浓度为百分之二十。原来盐水的浓度是多少?
![浓度问题6](/uploads/image/z/20252039-23-9.jpg?t=%E6%B5%93%E5%BA%A6%E9%97%AE%E9%A2%986)
解题思路: 根据题意列出方程,求解
解题过程:
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最终答案:略
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=434770")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
最终答案:略