Предмет: Математика, автор: сапсан123

Помогите сделать д/з по матем!!!

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Автор ответа: тто

1) 50+80=130км/ч - скорость удаления автобуса и машины
2) (50+80)*3=390км-скорость удаления автобуса и машины за 3 часа

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