Start by subtracting both sides by .

Next, subtract both sides by .

Finally, divide both sides by .

Start by subtracting from both sides.

Next, add to both sides of the equation.

Finally, divide both sides by .

In order to solve this problem we need isolate the variable on the left side o the equation. We will do this by performing the reverse of the operations that were done to the variable. It is important to note that what is done to one side of the equation needs to be done on the other.

Let's start by writing the equation.

Subtract from both sides of the equation.

Multiply both sides of the equation by .

Solve.