Bonjour,
[tex]A = (-8x + 2) - (-4 + 5x)\\
A = -8x + 2 +4 -5x\\
A = -13x + 6\\
B = -7 - (8-3x) + (-1+9x)\\
B = -7 - 8 + 3x - 1 + 9x\\
B = -16 + 12x\\
C = 4 (3x - 8) + (x + 3) x (-5)\\
C = 12x - 24 -5x -15\\
C = 7x -39\\
D = (-x +3) - (-x-4)\\
D = -x+3+x+4\\
D = 7[/tex]