a: =>2x+1=27

=>2x=26

=>x=13

b: =>\(\sqrt[3]{x+5}=x+5\)

=>x+5=(x+5)^3

=>(x+5)(x+4)(x+6)=0

=>x=-5;x=-4;x=-6

c: =>2-3x=-8

=>3x=10

=>x=10/3

d: =>\(\sqrt[3]{x-1}=x-1\)

=>(x-1)^3=(x-1)

=>x(x-1)(x-2)=0

=>x=0;x=1;x=2

1. forthcoming

2. noticeboard

3. withdraw

4. replacement

5. volunteers

6. refreshment

7. admittance

8. recognition

9. presentation

10. contribution (s)

Bn-viet-ro-ra-ddc-ko-mik-ko-thay-so-as

25.(-1/5)^3+1/5-3.(-1/3)^2-1/9

D

D

D

D

B

A

1 B

2 A

3 D

4 A

5 B

1 Preserving natural resources means reserving them for our future

2 In spite of the increase in air fares, most people still prefer to travel by plane

3  Regardless of your teaching method, the objective of any conversation class should be for student to practice spoken words

4 An injured man was taken to the hospital

5 In order for one to achive the desired results in this experiment, it is necessary that he work as fast as possible