Which of the following equations has exactly one solution?

A. 3x - 8 = 3x + 8
B. -8x + 3 = 8x + 3
C. -3x - 8 = 3x - 8
D. -3x + 8 = -3x - 8

1 answer

The equation that has exactly one solution is:

C. -3x - 8 = 3x - 8

This is because both sides of the equation have the same terms but with opposite signs. Therefore, when you simplify and solve for x, you will only get one unique solution.