Предмет: Математика, автор: lupa2511

Пасажирський поїзд долає відстань між Львовом і Києвом за 10 годин, а товарний цю відстань долає за 15 годин. Через який час ці поїзди зустрінуться? СРОЧНО ПОЖАЛУЙСТА!!!!!

lupa2511: Напишете пожалуйста в повному виде с полным решением ивсем остальным уровень 5 класс

Ответы

Автор ответа: Buvaett

Ответ:

нехай швидкість першого поїзда буде х, а другого у.

тоді за умовою буде 10х=15у.

звідти буде х=1,5у (15:10=1,5у)

швидкість зближення у+1,5=2,5у (у=1 = 1+1,5=2,5)

потім розділяємо відстань 15у на швидкість зближення виходе 15у/2,5=6г.

Пошаговое объяснение

15у/2,5=6г ( / - дробь)

сокращаем числитель и знаменатель - 15у/ 2,5 =6

6у=6

Разделяем на одну и то же значение - 6у =6

6у/6=6/6

и упрощаем выражение

6у/6=6/6

(у=1)

(прошу прощения ,если не правильно!! решение в начале не мое, постаралась объяснить!)

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