Which of the following equations have no solutions? Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
20x+40=40x+2020x+40=40x+2020, x, plus, 40, equals, 40, x, plus, 20

(Choice B)
B
40x+40=40x+2040x+40=40x+2040, x, plus, 40, equals, 40, x, plus, 20

(Choice C)
C
-20x+40=-20x+20−20x+40=−20x+20minus , 20, x, plus, 40, equals, minus, 20, x, plus, 20

(Choice D)
D
-40x+40=20x+20−40x+40=20x+20minus, 40, x, plus, 40, equals, 20, x, plus, 20