Предмет: Математика, автор: Maruysua

Когда от товарного состава отцепили 6 вагонов,а прицепили 19 вагонов,в нем стало 50 вагонов.Сколько вагонов было в составе первоначально?

Ответы

Автор ответа: triolana

пусть изначально в составе было х вагонов Составим уравнение

х-6+19=50

х=50+6-19

х=37 вагонов было первоначально

проверка: 37-6+19=50

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