http://ard.livejournal.com/ ([identity profile] ard.livejournal.com) wrote in [personal profile] tinedel 2011-03-29 09:47 pm (UTC)

Не знаю, я исписала два листа уравнениями но так ничего и не вышло. Может потмоу что считала время как 4 и 9, а не 16 и 21... У меня такое бывает - очевидного не вижу
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