Svp les mecs/meufs je suis gaver nul en maths donc si vous m’aidiez se serai sympa merci d’avance

Bonjour

A = (3/2 - 1/3) : (3/4 + 2/3)

A = [(3 x 3) / (2 x 3) - (1 x 2) / (3 x 2)] : [(3 x 3) / (4 x 3) + (2 x 4) / (3 x 4)]

A = (9/6 - 2/6) : (9/12 + 8/12)

A = 7/6 : 17/12

A = 7/6 x 12/17

A = 84/102

A = (6 x 14) / (6 x 17)

A = 14/17

B = 2 + 2/7 : 5/14

B = 2 + 2/7 x 14/5

B = 2 + 28/35

B = (2 x 35) / (1 x 35) + 28/35

B = 70/35 + 28/35

B = 98/35

B = (7 x 14) / (7 x 5)

B = 14/5

C = 3/14 - 3 : 7/5 + 1/2

C = 3/14 - 3 x 5/7 + 1/2

C = 3/14 - 15/7 + 1/2

C = 3/14 - (15 x 2) / (7 x 2) + (1 x 7) / (2 x 7)

C = 3/14 - 30/14 + 7/14

C = - 20/14.

C = (2 x - 10) / (2 x 7)

C = - 10/7.

D = 7/5 + 8/15 : 2/3 - 19/2

D = 7/5 + 8/15 x 3/2 - 19/2

D = (7 x 6) / (5 x 6) + 24/30 - (19 x 15) / (2 x 15)

D = 42/30 + 24/30 - 285/30

D = 219/30

D = (3 x 73) / (3 x 10)

D = 73/10.