b.\(\dfrac{27}{28}-\dfrac{4}{7}\)=\(\dfrac{11}{28}\)  c=\(\dfrac{4}{9}x\)\(\dfrac{6}{9}\)=\(\dfrac{8}{27}\)

a.\(\dfrac{7}{18}+\dfrac{7}{9}\)=\(\dfrac{7}{6}\)

a=\(\dfrac{10}{7}\)  b=\(\dfrac{2}{9}\) c=\(\dfrac{28}{45}\) d=\(\dfrac{5}{21}\)

1I i use the zalo ; facebook intargram app on my smartphone recently

2I am interested in entertainment applications such as watching movies, playing games or social network

3The first mobile app that I downloaded and tried was tiktok

4I want to use applications related to learning and looking up information effectively in the future

C

C

C

\(x=2 x=3\) nè nó ko có xuống đc :(

lên gg

ko