Calculer et donner le résultat sous forme d’une fraction simplifié merci d’avance

Bonjour,

D = - 5/7 - 2/3

D = (- 5 x 3) / (7 x 3) - (2 x 7) / (3 x 7)

D = - 15/21 - 14/21

D = - 29/21

E = - 9/2 + - 2/11

E = (- 9 x 11) / (2 x 11) - (2 x 2)/ (11 x 2)

E = - 99/22 - 4/22

E = - 103/22

I = - 7/6 + - 5/4

I = (- 7 x 2) / (6 x 2) - (5 x 3) / (4 x 3)

I = - 14/12 - 15/12

I = - 29/12

J = 19/20 - - 4/30

J = (19 x 3) / (20 x 3) + (4 x 2) / (30 x 2)

J = 57/60 + 8/60

J = 65/60

J = (5 x 13) / (5 x 12)

J = 13/12.