Tìm $x$ biết $x = \dfrac{3}{{13}} + \dfrac{9}{{20}}.$

$\dfrac{1}{{10}}$ 

$\dfrac{4}{5}$           

$\dfrac{2}{5}$          

$\dfrac{{ - 1}}{{10}}$

$\dfrac{{ - 53}}{{35}}$ 

$\dfrac{{51}}{{35}}$  

$\dfrac{{ - 3}}{{35}}$                  

$\dfrac{3}{{35}}$

$\dfrac{{ - 4}}{{11}} + \dfrac{7}{{ - 11}} > 1$ 

$\dfrac{{ - 4}}{{11}} + \dfrac{7}{{ - 11}} < 0$  

$\dfrac{8}{{11}} + \dfrac{7}{{ - 11}} > 1$

$\dfrac{{ - 4}}{{11}} + \dfrac{{ - 7}}{{11}} >  - 1$

$- \dfrac{5}{{16}}$ 

$\dfrac{5}{{16}}$     

$\dfrac{{19}}{{16}}$       

$- \dfrac{{19}}{{16}}$

$\dfrac{9}{5}$ 

$\dfrac{{11}}{5}$  

$\dfrac{{ - 11}}{5}$

$\dfrac{{ - 1}}{5}$

$A > 1$          

$A = \dfrac{2}{{11}}$          

$A = 1$                

$A = 0$