We need to solve the following equation:
Solving an equation is the same as finding the value of x.
In order to do so, we need to apply a sequence of the same operations on both sides of the equation, until we isolate the variable x on the left side of the equation, and find its value.
First, let's isolate 3x on the left side. We need to subtract 9 from both sides:
Now, to end with x on the left side, we need to divide both sides by 3:
Answer: B) x = -15