9 I find carving eggshells boring because it takes a lot of time to complete one shell

10 I think play volleyball is interesting because it is a team game.

11 My brother doesn't goto class to learn how to paint. He learnt Everything on the Internet

X

1 for

2 has

3 Yesterday

4 which

5 of

6 went

7 sent

8 will

9 where

10 thay

11 were

1. My

2. their

3. its

4. his

5. yours

6. theirs - Our

7. my

8. ours

9. yours

10. his

1my

2theirs

3its

4his

5your

6theirs/our

7my

8ours

1. My

2. their

3. its

4. his

5. yours

6. theirs - Our

7. my

8. ours

9 yours

10 his

11. đề sai ko nhỉ? câu mẫu là new house mà từ đã cho là dream house :v??

Does your dream house have an attic?

12. The dog is between the sofa and the wardrobe

13. There are two bookshelves in Tom's bedroom

14. The big tree is in front of my house

15. The bike is between the motorbike and the car

56. C

57. B

58. C

59. D

60. B

                                                               Bài giải

\(3\left(5^x-1\right)-2=70\)

\(3\left(5^x-1\right)=72\)

\(5^x-1=24\)

\(5^x=25=5^2\)

\(x=2\)

           Bài làm :

Ta có :

\(3\left(5^x-1\right)-2=70\)

\(\Leftrightarrow3\left(5^x-1\right)=72\)

\(\Leftrightarrow5^x-1=24\)

\(\Leftrightarrow5^x=25\)

\(\Leftrightarrow x=2\)

Vậy x=2

Bài làm :

\(3.\left(5^x-1\right)-2=70\)

\(\Rightarrow3.\left(5^x-1\right)=70+2\)

\(\Rightarrow3.\left(5^x-1\right)=72\)

\(\Rightarrow5^x-1=72:3\)

\(\Rightarrow5^x-1=24\)

\(\Rightarrow5^x=25\)

\(\Rightarrow5^x=5^2\)

\(\Rightarrow x=2\)

Vậy x = 2 .

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