Предмет: Алгебра, автор: ksenofontovleha

расстояние в 210 км катер проходит по течению реки на 4ч быстрее,чем против течения. Определите собственную скорость катера, если известно, что скорость течения равна 3 км/ч

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Автор ответа: ЮляшкаКузнецова

Вот :) решение)
Пользуйся)

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Автор ответа: mrsvyastin

210/(х-3)-210/(х+3)=4
105(х+3-х+3)/(х-3)(х+3)=2
630=2х^2-18
2x^2=648
x^2=324
x=18)))

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