练习册

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    解法一:设乙班有人捐款.则甲班有人捐款．············ 1分 根据题意得: ······························ 5分 解这个方程得．···························· 8分 经检验是所列方程的根．························ 9分 (人) 答:甲班有48人捐款.乙班有45人捐款．·················· 10分 解法二:设甲班有人捐款.则乙班有人捐款．·············· 1分 根据题意得: ······························ 5分 解这个方程得．···························· 8分 经检验是所列方程的根．························ 9分 (人) 答:甲班有48人捐款.乙班有45人捐款．·················· 10分 【查看更多】

     

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