Ý b là x-28 mà bạn!

\(d.4.4.4.4.4.16=2^2.2^2.2^2.2^2.2^2.2^4=2^{14}\)

\(e.5.5.5.5.3.3.3.15=5^4.3^3.3.5=5^5.3^4\)

\(e.6.6.6.7.7.7.42=6^3.7^3.2.3.6=2^3.3^3.7^4.2.3=2^4.3^4.7^4\)

\(a.720:\left(x-17\right)=12\)

\(x-17=60\)

\(x=77\)

\(b.\left(x-28\right):12=8\)

\(x-28=96\)

\(x=124\)

\(c.26+8x=6x+46\)

\(8x-6x=46-26\)

\(2x=20\)

\(x=10\)

\(d.3600:\left[\left(5x+335\right):x\right]=50\)

\(\left(5x+335\right):x=72\)

\(5+335:x=72\)

\(335:x=67\)

\(x=5\)

1. B

2. D

3. C

4. B

5. A

6. D

7. B

8. C

9. B

10. B

Lần sau bạn chụp rõ hơn tí nhé, chứ hơi khó nhìn

Bạn đăng lại câu hỏi nhé

2. My father enjoys doing gardening...

3. He is interested in going on...

4. My cousin is crazy about Manchester United football team

5. I am keen on playing badminton every morning

1. don't visit

2. to speak

3. is having

4. give

5. watching

6. doing

7. play

8. to buy

9. working

10. Does Mai go

1. makes

2. doesn't eat/ make

3. smoke

4. Does Mark go

5. Do your parents like

6. do you go

7. does your sister work

8. doesn't usually have

9. does

10. hang