小红乘汽车从家去县城.当汽车行完全程的2/5时,小红算得剩下的路程正好比已走过路程多10千米.小红从家到县城有多少千米?菜场上原有450千克马铃薯和西红柿.马铃薯卖出1/3.西红柿卖出70%后,
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/07 19:31:07
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