Which of the following is an example of an equation with exactly one solution?

Question

A. 4x + 3 = 4x + 3
B. 3x + 4 = 4x + 3
C. 3x + 4 = 3x + 3
D. 3x + 4 = 3x + 4

Answer 1

D. 3x + 4 = 3x + 4