a, \(\dfrac{2}{3}\) - \(\dfrac{4}{7}\) : \(\dfrac{9}{14}\)

b, x - \(\dfrac{7}{3}\) = \(\dfrac{8}{9}\)

c, \(\dfrac{3}{4}\) x + \(\dfrac{1}{4}\) ( x + 1 ) = - \(\dfrac{11}{4}\)

2/3 - 4/7 : 9/14

\(\dfrac{5}{12}\) + \(\dfrac{7}{4}\) - \(\dfrac{2}{3}\)

Câu 1: 

\(\dfrac{13}{15}\). 0,75 - (\(\dfrac{9}{20}\) + 25% ) : 1\(\dfrac{2}{5}\)

Câu 2:

a, \(\dfrac{3}{2}\) - x = \(\dfrac{4}{9}\)

b, \(\dfrac{x}{3}\)+ 2  \(\dfrac{3}{7}\)= \(\dfrac{-5}{2}\)