Bonjour pouvez vous me dire mon calcul est correcte

Bonsoir Mehdi94380 

[tex]A= \dfrac{24}{35}-\dfrac{\dfrac{3}{5}-\dfrac{9}{7}}{2-\dfrac{11}{4}}\\\\\\A= \dfrac{24}{35}-\dfrac{\dfrac{21}{35}-\dfrac{45}{35}}{\dfrac{8}{4}-\dfrac{11}{4}}\\\\\\A= \dfrac{24}{35}-\dfrac{-\dfrac{24}{35}}{-\dfrac{3}{4}}[/tex]

[tex]A= \dfrac{24}{35}-\dfrac{\dfrac{24}{35}}{\dfrac{3}{4}}\\\\\\A= \dfrac{24}{35}-\dfrac{24}{35}\times\dfrac{4}{3}}\\\\\\A= \dfrac{24}{35}-\dfrac{96}{105}\\\\\\A= \dfrac{72}{105}-\dfrac{96}{105}[/tex]


[tex]A= -\dfrac{24}{105}\\\\\boxed{A= -\dfrac{8}{35}}[/tex]