3袋大米和8袋面粉共重510千克,3袋大米和5袋面粉共重375千克.每袋大米和每袋面粉各重多少千克?
人气:203 ℃ 时间:2019-08-19 23:12:08
解答
每袋面粉重(510-375)/(8-5)=45kg
每袋大米重(510-45*8)/3=50kg
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