Предмет: Алгебра, автор: RusyaBullet

5(8x-1)-7(4x+1)+8(7-4x)=9

Ответы

Автор ответа: Katelily
0

5(8х-1)-7(4х+1)=9-8(7-4х)

40х-5-28х-7=9-56+32х

40х-28х-32х=9-56+5+7

-20х=-35

х=-35(-20)

х=1.75

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Reading

  Read the text. Then match the topics with the paragraphs of the text.

/introduction/ packaging recycling rubbish    transport waste
 
 
 
Paragraph 1       introduction
Paragraph 2                                                        
Paragraph 3                                                        
Paragraph 4                                                        
Paragraph 5                                                        
Paragraph 6                                                        

A guide to saving the environment –
five top tips
1   We all want to reduce our impact on the environment. What practical things can we do which will make a difference?
2   Cars, motorcycles and planes all cause a lot of pollution. Try to walk or cycle. It’s also good exercise.
3   We throw away a lot of things which we can use again. Did you know that recycling one tin can save enough energy to power a television for three hours?
4   We throw away a third of all the food we buy. At least half of the food which we throw away is fresh and we could eat it.
5   Buy things which don’t have a lot of packaging. Governments are trying to make supermarkets reduce their packaging, but progress is slow.
6   Bottles and cans in the streets look horrible, but they are also an environmental problem. Use the bins.​