Which of the following equations has a different value of a than the others? (1 point)

x - 7/8 = - 3/2
x + 9/8 = 7/4
x + 0.875 = 1.5
x - 0.025 = 0.6

The equation x - 7/8 = - 3/2 has a different value of a than the others.