1)Пусть скорость Димы равна х. Тогда Толя вскапывает грядки со скоростью (х + 1). За 20 мин Дима вскопал 20х м2, а Толя за 10 мин 10(х + 1) м2, что по условию равно.
Имеем: 10х + 10 = 20х
10х = 10
х = 1
Дима вскапывал со скоростью 1 м2, а Толя 2м2.
2)Пусть запланированное количество дней равно х.
Если Аня работала со скоростью 8 задач в день, то всего задач она бы решила 8х. Работая со скоростью 10 задач в день, она решила 10(х - 2), что по условию на 2 задачи больше.
Имеем: 8х = 10х - 20 + 2
2х = 16
х = 8
Значит, Аня планировала выполнить задание за 8 дней.
Heads and Tails ”not in vain won the nomination for the best TV shows, since the idea itself is unique, not only in terms of tourism, but also in terms of the entire meaning of the program, since it thinks not only about the rich life of travel. It reveals all the romanticism of tourism, and the accessibility of admiration for everything that nature and God himself have created, revealing the unique sides of cities, peoples and nations with their customs, which would hardly have been known without traveling on the TV screen. Changing the presenters, the author of the program enriches the story, in which each storyteller makes his own contribution and presents the delights of the world according to his vision.
Пошаговое объяснение:
1)Пусть скорость Димы равна х. Тогда Толя вскапывает грядки со скоростью (х + 1). За 20 мин Дима вскопал 20х м2, а Толя за 10 мин 10(х + 1) м2, что по условию равно.
Имеем: 10х + 10 = 20х
10х = 10
х = 1
Дима вскапывал со скоростью 1 м2, а Толя 2м2.
2)Пусть запланированное количество дней равно х.
Если Аня работала со скоростью 8 задач в день, то всего задач она бы решила 8х. Работая со скоростью 10 задач в день, она решила 10(х - 2), что по условию на 2 задачи больше.
Имеем: 8х = 10х - 20 + 2
2х = 16
х = 8
Значит, Аня планировала выполнить задание за 8 дней.
Heads and Tails ”not in vain won the nomination for the best TV shows, since the idea itself is unique, not only in terms of tourism, but also in terms of the entire meaning of the program, since it thinks not only about the rich life of travel. It reveals all the romanticism of tourism, and the accessibility of admiration for everything that nature and God himself have created, revealing the unique sides of cities, peoples and nations with their customs, which would hardly have been known without traveling on the TV screen. Changing the presenters, the author of the program enriches the story, in which each storyteller makes his own contribution and presents the delights of the world according to his vision.