Предмет: Алгебра, автор: DreamDiamond

Помогите пожалуйста!!!!

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Автор ответа: miron2077

1

х скорость в неподвижной воде

х+5 скорость по течению

х-5 против течения

140/(х+5)+140/(х-5)=32-11

решение уравнения на фото

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