http://marss2.livejournal.com/ ([identity profile] marss2.livejournal.com) wrote in [personal profile] civil_engineer 2014-05-01 09:46 am (UTC)

===Ответ можно получить вычислением 2/(1/5—1/7)=35 дней ==

а откуда взялось 2 в числителе?
(50 comments)

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