C

A

Giúp mik câu 3 và 5 vs ạ.mik c/ơn

sai chỗ nào vậy ạ

a.3x=2-(-1)

3x=3

x=3:3

x=1

b.x.(2+3+4-5)=16

  x.4=16

  x=16:4

  x=4

c.\(x:\dfrac{2}{3}=\dfrac{1}{5}-\dfrac{3}{4}\)

  \(x:\dfrac{2}{3}=\dfrac{-11}{20}\)

  \(x=\dfrac{-11}{20}.\dfrac{2}{3}\)

 \(x=\dfrac{-11}{30}\)

d,\(\left(3.x-\dfrac{1}{2}\right):3=\dfrac{1}{5}+4\)

   \(\left(3.x-\dfrac{1}{2}\right):3=\dfrac{21}{20}\)

   \(3.x-\dfrac{1}{2}=\dfrac{21}{20}:3\)

   \(3.x-\dfrac{1}{2}=\dfrac{7}{20}\)

  \(3.x=\dfrac{7}{20}+\dfrac{1}{2}\)

  \(3.x=\dfrac{17}{20}\)

  \(x=\dfrac{17}{20}:3\)

  \(x=\dfrac{17}{60}\)

1. Next Monday at this time I _____will lie__________ on the beach!
2. She _____will wait__________ outside the cinema at 7.30. Good luck!
3. All tomorrow afternoon, my boyfriend _____will work__________ on his history project.
4. In two years' time, my elder brother _____will go__________ into the army.
5. Don't phone at 10.00, because they _____will watch__________ the match then.
6. In five years' time, I expect we ______will live_________ in my own flat.
7. At this time next Sunday, the news presenters ____will catch___________ the plane to Brazil.
8. There will be a big sale at Pico tomorrow. I'm sure people _____will quece__________ on up the street from early
morning

a,\(=\dfrac{11}{17}.\dfrac{19}{23}+\dfrac{11}{17}.\dfrac{4}{23}\)

  \(=\dfrac{11}{17}.\left(\dfrac{19}{23}+\dfrac{4}{23}\right)\)

\(=\dfrac{11}{17}.1\)

\(=\dfrac{17}{17}\)

b,\(=-2:\left(\dfrac{-1}{4}\right)^2\)

\(=-2:\dfrac{1}{16}\)

\(=-32\)

c,\(=\left(\dfrac{31}{15}+\dfrac{41}{25}-\dfrac{-51}{35}\right)\left(\dfrac{3}{6}-\dfrac{2}{6}-\dfrac{1}{6}\right)\)

\(=\left(\dfrac{31}{15}+\dfrac{41}{25}-\dfrac{-51}{35}\right).0\)

\(=0\)

d,\(=\dfrac{-4}{6}+\dfrac{-9}{6}-\dfrac{-7}{8}\)

\(=\dfrac{-13}{6}-\dfrac{-7}{8}\)

\(=\dfrac{-31}{24}\)

Điền yet hoặc already vào chỗ trống trong mỗi câu sau.
1. The girl has not eaten her lunch ______yet_________.
2. Have you bought the tickets for our journey____yet___________?
3. I have _______already________eaten the sushi.
4. Have you packed your bags _____yet__________?
5. Have you finished repainting the fence_______yet________?
6. We’ve _______already________seen the movie.
7. Daniel hasn’t fixed the broken pipe_____yet__________.
8. He has _______already________finished his assignment.
9. She has not eaten anything for breakfast_____yet__________.
10. We have ______already_________had chance to work with your teache