Which of the following equations have exactly one solution? Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
19x+18=-19x+1819x+18=−19x+1819, x, plus, 18, equals, minus, 19, x, plus, 18

(Choice B)
B
19x-18=-19x+1819x−18=−19x+1819, x, minus, 18, equals, minus, 19, x, plus, 18

(Choice C)
C
-19x-18=-19x+18−19x−18=−19x+18minus , 19, x, minus, 18, equals, minus, 19, x, plus, 18

(Choice D)
D
-19x+18=-19x+18−19x+18=−19x+18