Chọn câu sai. Với \(a;b;m \in Z;b;m \ne 0\) thì

\(x = 7\)

\(x = 5\)  

\(x = 15\)        

\(x = 6\)

\(\dfrac{5}{{20}}\) và \(\dfrac{{25}}{{20}}\)

\(\dfrac{{15}}{{20}}\) và \(\dfrac{16}{{20}}\)

\(\dfrac{5}{4}\) và \(\dfrac{2}{3}\)

\(\dfrac{1}{2}\) và \(\dfrac{3}{2}\)

$\dfrac{{11}}{6}$ 

\(\dfrac{7}{6}\)  

\(\dfrac{{13}}{6}\)     

\( - \dfrac{5}{6}\)

$1\dfrac{2}{3}$ 

\(3\dfrac{1}{3}\)  

\(3\dfrac{1}{4}\)           

\(1\dfrac{1}{3}\)

\(\dfrac{{ - 58}}{{73}}\) 

\(\dfrac{{58}}{{73}}\)            

\(\dfrac{{73}}{{ - 58}}\)           

\(\dfrac{{58}}{{73}}\)

\(\dfrac{m}{n}\)

\(\dfrac{n}{m}\)

\(\dfrac{{ - n}}{m}\)

\(\dfrac{m}{{ - n}}\)