у 2 однакових мішках зерна на 4 ц 20 кг менше, ніж у 7 таких самих мішках. Яка маса зерна у цих 7 - №24294671

у 2 однакових мішках зерна на 4 ц 20 кг менше, ніж у 7 таких самих мішках. Яка маса зерна у цих 7 мішках?
Допоможіть розвязати діями з поясненями.
- Предмет:
  Математика
- Автор:
  nolaproctor
- 5 лет назад

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Мне ну жно сократить билет Как минимум что бы было 10 строчек, а максимум 15
ENVIRONMENT

Our country. Our environment. There are many big and small rivers, green forests, high mountains, lakes and seas in Russia.
Our Earth is our home. I think people must take care of our Motherland.
There are several laws and decisions on this important subject. We have state or-ganizations which pay attention to this problem.
International conventions pay a lot of attention to controlling pollution too.
There are a lot of industrial enterpris¬es in our country that’s why we can’t ig¬nore the problem of the protection of our environment. Our main aim is protec¬tion. Our environment must be clean. What must we do? We have to control at¬mospheric and water pollution, to study man’s influence on the climate. The pol¬lution of the environment influences the lives of animals, plants and humans. If we don’t use chemicals properly we’ll pollute our environment.
Our plants and factories put their waste materials into the water and at¬mosphere and pollute the environment.
There are many kinds of transport in our big cities, that is why we must pay attention to the protection of our nature and the health of people.
Radiation has become one of the main problems. It is not good for people’s health. Many people died from radiation some years ago in Chernobol. It was a tragedy. Another problem is earth¬quakes. We have had some terrible earthquakes in Armenia. Our scientists try to forecast earthquakes so that we can protect ourselves from them.
All over the world people do a lot to protect nature, to make their countries richer, to make their lives happier.
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