Bonsoir , merci de votre aide

Bonsoir,

H = 3 - (3/56 - 3/24)

H = (3 x 168) / (1 x 168) - [(3 x 3) / (56 x 3) - (3 x 7) / (24 x 7)]

H = 504/168 - (9/168 -21/168)

H = 504/168 - (- 12/168)

H = 504/168 + 12/168

H = 516/168

H = (12 x 43) / (12 x 14)

H = 43/14.

I =       1____

   4/14 + 2/8

I =                     1____________

(4 x 4) / (14 x 4) + (2 x 7) / (8 x 7)

I =          1_____

   16/56 + 14/56

I =  1 : 30/56

I = 1 x 56/30

I = 56/30

I = (2 x 28) / (2 x 15)

I = 28/15

J = 3/2 - 5/3

   - 3/7  + 1

J = [(3 x 3) / (2 x 3) - (5 x 2) / (3 x 2)]

           - 3/7 + (1 x 7) / (1 x 7)

J = 9/6 - 10/6

   -3/7 + 7/7

J = - 1/6 : 4/7

J = - 1/6 x 7/4

J = - 7/24