Which of the following statements describes a correct method for solving this equation?
15 + 3x =18
A.
Divide both sides of the equation by 3, and then add 15 to both sides.
B.
Divide both sides of the equation by 3, and then subtract 30 from both sides.
C.
Subtract 15 from both sides of the equation, and then divide both sides by 3.
D.
Add 15 to both sides of the equation, and then divide both sides by 3.