Réponse :
Explications étape par étape :
Bonsoir
A = (a/6 + 3) + ( - 5a/6 - 1/3)
A = a/6 + 3 - 5a/6 - 1/3
A = - 4a/6 + 9/3 - 1/3
A = - 2a/3 + 8/3
B = (-3a + 1/4) - (a/4 - 1) + (-a + 1/3)
B = -3a + 1/4 - a/4 + 1 - a + 1/3
B = - 3a - a/4 - a + 1/4 + 1 + 1/3
B = - 4 a - a/4 + 12/12 + 3/12 + 4/12
B = - 16a /4 - a/4 + 19/12
B = - 17a/4 + 19/12
C = x/3 - [5x/6 - (x + 2) ]
C = x/3 - [ 5x/6 - x - 2]
C = x/3 - 5x/6 + x + 2
C = 2x/6 - 5x/6 + 6x/6 + 2
C = 3x/6 + 2
C = x/2 + 2
D = (x/2 - x/3) - [ (3 + 3x/2) - (x/3 - 1) + 7x/2]
D = ( 3x/6 - 2x/6) - [ 3 + 3x/2 - x/3 + 1 + 7x/2]
D = x/6 - [ 4 + 10x/2 - x/3]
D = x/6 - [4 + 30x/6 - 2x/6]
D = x/6 - [ 4 + 28x/6]
D = x/6 - 4 - 28x/6
D = - 4 - 27x/6
