bonjour qui peux m'aider j'ai trouvé a=3/6 b=7/10 et c=-6 mais je ne suis pas sûre du tout merci

bonjour

a = (-2/3+1/2) : (17/9-1/3)
a = (-4/6+3/6) : 17/9-3/9
a = -1/6 : 14/9
a = -1/6 x 9/14
a = - 9/84
a = -3/28

b = 9/5 -2/5 x11/4
b = 9/5 - 1/5x11/2
b = 9/5 -11/10
b = 18/10-11/10
b = 7/10

c = 11 :(2/3 -5/2)
c = 11 : (4/6-15/6)
c = 11 : -11/6
c = 11 x -6/11
c = -6

Bonjour,

A=  - 2/3 + 1/2
     17/9 - 1 /3
A = - 2 x 2 / 3 x 2 + 1 x 3 / 2 x 3
                 17/9 - 1 x 3 / 3  x 3
A = - 4/6 + 3/6
        17/9 - 3/9
A = - 1/6 : 14/9
A = - 1/6 x 9/14
A = - 9/84
A = 3 x - 3 / 3 x 28
A = - 3/28

B = 9/5 - 2/5 x 11/4
B = 9/5 - 22/20
B = 9 x 4 / 5 x 4 - 22/20
B = 36/20 - 22/20
B = 14/20
B = 2 x 7 / 2 x 10
B = 7/10

C = 11 : (2/3 - 5/2)
C = 11 : (2 x 2 / 3 x 2 - 5 x 3 / 2 x 3)
C = 11 : (4/6 - 15/6)
C = 11 : - 14/6
C = 11 x - 6/14
C = - 66/14
C = 2 x - 33 / 2 x 7
C = - 33/7