Once you have entered the problem, simply click on the Solve button. This will display all the steps of the solution process:

You can obtain an explanation for any step by clicking on it. Please note that you cannot click on the very first expression, which is the original problem. 

Also notice that we use the definistion for absolute value:

If you want to see graphed the solution, you can clikck on "Graph" tab and you will get: