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一道复杂奥数题

2025-03-31 18:11:08

推荐回答（2个）

回答1：

设-个三位数分别为x,则另一个为999-x
根据题意有：
x+(999-x)/1000=6*(999-x+x/1000)
解得
x=857
999-x=142
两个三位数的差是857-142=715

回答2：

y=142,,,,,x=857
令,x,y
{x+y=999,,,,,,,1000x+y=6(1000y+x)}
联立求解,搞定
差自己算吧

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