A= 38 + 7 - x + 3x+5= 50 -x +3x-7= 2x+43
B= 4-1a +4a -8 = 3a -4
C= 3(x+5) + 4(x-2) = 3x +15 + 4x -8 = 7x+7
D= -5x -5 +7x -5 = 2x -10
E= 6x -21 -5x -5 = 1x -26
F= 4x -4 +3x -21 = 7x -25
G= x(3x-2) - (4 x 2 +7x-3) =
3x^2 -2x -8 -7x + 3 = 3x^2 -9x -5
H= 2a - 3b + 8a -12b= 10a -15b