July 2021 1 20 Report
лодка прошла 3 ч по течению реки и 7 ч против течения, проплыв за всё это время 62 км. Скорость течения реки 2 км/ч. Найдите собственную скорость лодки. Решите задачу методом составления уравнения. Заранее спасибо!!!
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