Sagot :
B = 1 + 4t - 2 - t
B = 4t - t - 2 + 1
B = 3t - 1.
C = 2 - (3 + 4x)
C = 2 - 3 - 4x
C = - 4x - 1
D = x - 1 - (2x - 3)
D = x - 1 - 2x + 3
D = x - 2x - 1 + 3
D = - x + 2.
B = 4t - t - 2 + 1
B = 3t - 1.
C = 2 - (3 + 4x)
C = 2 - 3 - 4x
C = - 4x - 1
D = x - 1 - (2x - 3)
D = x - 1 - 2x + 3
D = x - 2x - 1 + 3
D = - x + 2.