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December 22, 2014

December 22, 2014

Posted by **Kiki** on Sunday, November 8, 2009 at 4:17pm.

- math -
**Reiny**, Sunday, November 8, 2009 at 5:36pmAfter t hours since the second train left the station,

the first train went 70t + 140

the second train 90t

so solve 70t + 140 + 90t = 1420

(I got t=8, confirm this please)

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