Tillie is solving an equation for x . Her first step is to subtract 8 from both sides of the equation. Which equation is she solving?
A:12 - x = -8
B:12 = -x + 8
C:12 = -x - 8
D:12 - x = 8
A:12 - x = -8
B:12 = -x + 8
C:12 = -x - 8
D:12 - x = 8