Предмет: Математика, автор: daniilosipenk20

Помогите пожалуйста 4 и 5

Приложения:

Ответы

Автор ответа: SlytherinPrince

4.
Пусть x - V второго легкового автомобиля, тогда 7х - его S.

Составим уравнение:

110×7+7х=1400

770+7х=1400

7х=1400-770

7х=630

х=630:7

х=90

Ответ: Другой легковой автомобиль ехал со скоростью 90 км/ч.

5.

Пусть х - скорость второго путешественника, тогда 5х - его расстояние.

5х=45-4×5

5х=45-20

5х=25

х=25:5

х=5

Ответ: Второй путешественник шёл со скоростью 5 км/ч

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