Bonjour pouvez vous m'aider sil'vous plait merci d'avance

Bonjour,

M = 4/9 - 2 x (13 + 3) / (13 - 1)

M = 4/9 - 2 x 16/12

M = 4/9 - 32/12

M = (4 x 4) / (9 x 4) - (32 x 3) / (12 x 3)

M = 16/36 - 96/36

M = - 80/36

M = (4 x - 20) / (4 x 9)

M = - 20/9

N = - 5/3 - (6/4 x 8/18) + 2/3

N = - 5/3 - 48/72 + 2/3

N = - 5/3 - (24 x 2) / (24 x 3) + 2/3

N = - 5/3 - 2/3 + 2/3

N = - 5/3

Q = - 1/3 - 7/6 x (4/7 - 5/4) + 3

Q = - 1/3 - 7/6 x [(4 x 4) / (7 x 4) - (5 x 7) / (4 x 7)] + 3

Q = - 1/3 - 7/6 x (16/28 - 35/28) + 3

Q = - 1/3 - 7/6 x - 19/28 + 3

Q = - 1/3 + 133/168 + 3

Q = (- 1 x 8) / (3 x 8) + (7 x 19) / (7 x 24) + (3 x 24) / (1 x 24)

Q = - 8/24 + 19/24 + 72/24

Q = 83/24

R = (11/3 + 11/7) : (11/6 + 11/4)

R = [(11 x 7) / (3 x 7) + (11 x 3) / (7 x 3)] : [(11 x 2) / (6 x 2) + (11 x 3) / (4 x 3)]

R = (77/21 + 33/21) : (22/12 + 33/12)

R = 110/21 : 55/12

R = 110/21 x 12/55

R = 1 320/1 155

R = (165 x 8) / (165 x 7)

R = 8/7