a. [(6x-72):2-84]=5628

(6x-72):2 =5628+84

(6x-72):2 =5712

6x-72 =5712:2

6x-72 =2856

6x =2856+72

6x = 2928

x =2928:6

x = 488

Vậy x=488

b.( \(\dfrac{9}{2}\)-2x):75%=1\(\dfrac{1}{3}\)

(\(\dfrac{9}{2}\)-2x):\(\dfrac{3}{4}\) =\(\dfrac{4}{3}\)

\(\dfrac{9}{2}\)-2x = \(\dfrac{4}{3}\)×\(\dfrac{3}{4}\)

\(\dfrac{9}{2}\)-2x =1

2x =\(\dfrac{9}{2}\)-1

2x =\(\dfrac{9}{2}\)-\(\dfrac{2}{2}\)

2x =\(\dfrac{7}{2}\)

x = \(\dfrac{7}{2}\):2

x =\(\dfrac{7}{2}×\dfrac{1}{2}\)

x =\(\dfrac{7}{4}\)

Vậy x=\(\dfrac{7}{4}\)

Các năm ra đời:

1. năm 1941

2. năm 1957

3. năm 1999

4. năm 1974

5. năm 1971

6. năm 1950

7. năm 1949

10. năm 1854

Không biết là đúng không nhưng trong sáchsách nó ghi vậy. Nhớ ấy ấy cho mình nha.......

Marking the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions from 11 to 15.

I prefer living(A) in a nuclear family(B) than(C) a joint one(D

A. living

B. family

C. than

D. a joint one

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 1 to 10.

 The future of the daily newspaper is in danger. With changes in people’s reading habits and financial concerns, it seems that more and more of us are turning (1)…………from the traditional daily newspaper as a means of getting our information and going online or to TV news for the headlines and main stories instead. Does this mean that newspaper will (2)…………become a thing of the past?

 Many experts believe that newspapers will survive in some form in the future (3)…………the convenience of the internet, their main rival. The main reason for thinking this is that a large percentage of the population is (4)…………35 and has a strong newspaper reading habit. For  many of these people, reading newspapers is not simply a way of getting the information about (5)…………events but part of a traditional routine. For them, catching up with the main stories electronically from news websites or TV news broadcast will never be a real substitute for turning the pages of a paper on the train or at the table.

However the main competition for newspapers (6)…………from their own online version. Access to these is currently free of charge but for how much longer? Many newspaper corporations are (7)…………that the only way forward for all newspapers is to charge customers to read the online versions. Apparently, surveys (8)…………that as many as 48%of British and American consumers are prepared to pay for this service, although they are not prepared to pay very (9)…………! Would you be willing to pay for online access to news websites or should it continue to be free for everyone? Can you (10)…………a world without newspapers? 

Điền vào ô 4

A. over                 

B. more                

C. after                 

D. further

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each of the following questions from 19 to 26.

          Conservation conflicts arise when natural resource shortages develop in the face of steadily increasing demands from a growing human population. Controversy frequently surrounds how a resource should be used , or allocated , and for whom. For example , a river may supply water for agricultural irrigation, habitat for fish , and water-generated electricity for a factory. Farmers , fishers , and industry leaders vie for unrestricted access to this river , but such freedom could destroy the resource , and conservation methods are necessary to protect the river for future use . Conflicts worsen when a natural resource crosses political boundaries . For example , the headwaters , or source , of a major river may be located in a different country rather than the country though which the river flows . There is no guarantee that the river source will be protected to accommodate resource needs downstream . In addition , the way in which one natural resource is managed has a direct effect upon other natural resources . Cutting down a forest near a river , for instance , increases erosion , the wearing-away of such as fish and important aquatic plants that require clean , clear freshwater for survival.

Which word in the reading means “a promise that something will be done or will happen , especially in a particular period of time ?”

A. Shortage   

B. guarantee         

C. population       

D. habitat