...需费用3520元,若甲单独做6天后,剩下的工程由乙独
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发布时间：2024-02-06 13:19
共1个回答
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时间：2024-07-30 12:38
根据题意得：1x+1y＝186x+12y＝1，
解得：x＝12y＝24，
经检验x＝12y＝24是方程组的解．
甲单独完成此项工程需要12天，乙单独完成此项工程需要24天；
（2）设甲工作一天的费用是m元，乙一天的费用是n元，
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