Khan Academy
Start with learning the basics. Khanacademy is a good start. A basic algebra book is also good.
Learn the basics before you start the math destroyer. Purplemath.com is also a good website. Once you understand the basics then you can tackle the Math Destroyer. Don't get discouraged. As you progress you will see different type of problems asked different ways and you'll get a grasp of the best way of solving them.