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GZShi

GZShi

V2EX member #29583, joined on 2012-11-10 16:46:29 +08:00
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Nov 10, 2012
Replied to a topic by shoper › 问与答 › 小学数学题求解？
设甲乙的速度分别为x和y，列出方程组：
> x*(7/10) + (x+y)*(3/10) = 12+(1/3)
> x*(10/10) = 23

解得y = -35.56天
不科学……
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