Final answer:
To solve the equation -12x = 9, divide both sides by -12 to isolate the variable x. The solution is x = -3/4.
Step-by-step explanation:
To solve the equation -12x = 9 using the multiplication property of equality, you need to divide both sides of the equation by -12. By doing so, you isolate the variable x on one side of the equation. Remember that when you divide or multiply both sides of an equation by a negative number, you need to flip the inequality sign. In this case, dividing both sides by -12 gives you x = -9/12 or x = -3/4.