Question

Bài một nha

Answer 1

Câu 2:

a: Ta có: \(x+\dfrac{4}{5}=\dfrac{8}{9}\)

\(\Leftrightarrow x=\dfrac{8}{9}-\dfrac{4}{5}=\dfrac{40}{45}-\dfrac{36}{45}=\dfrac{4}{45}\)

b: Ta có: \(x-\dfrac{7}{2}=\dfrac{3}{4}\)

\(\Leftrightarrow x=\dfrac{3}{4}+\dfrac{7}{2}=\dfrac{3}{4}+\dfrac{14}{4}=\dfrac{17}{4}\)

Answer 2

Câu 1

\(\dfrac{7}{8}\)

Answer 3

\(\dfrac{17}{4}\) nha bn