Equations
Given equation:

In order to solve this equation, isolate x on one side of the equation.
Begin by adding 2x to both sides:

Add 2 to both sides:

Combine the like terms now:

The next step is to divide both sides by 5 - and then, x will be all by itself on the left side of our equation. That was our goal, was it not?

We now know that the value of x for this equation is -9.