Complete each equation so that it is true for all values of x: 15x - 10/5 = _ -2
a. "15x - 10/5 = 3x - 2"
b. "15x - 10/5 = 5x - 2"
c. "15x - 10/5 = 10x - 2"
d. "15x - 10/5 = 7x - 2"