If |x - 20| = 40 what is the sum of all the values of x. Choose the correct choice from the following answers:
A) 0
B) 60
C) - 80
D) 40
E) 80

Rationale: "there will be two cases x - 20 = 40 and x - 20 = - 40 solve for x = > x = 40 + 20 = > x = 60 or x = - 40 + 20 = > x = - 20 the sum of both values will be 60 + - 20 = 40 answer is d"
Answer: D