I would suggest starting with a little bit of Pre-Algebra to gain a foundation of the basics. Start here:
http://www.algebra-class.com/basic-algebra.html
Once you are comfortable with integers and simplifying and evaluating expressons, move onto solving equations.
This website is a completely free resource designed for students and parents who are having difficulty with Algebra 1. If you follow the units in order, you can learn an entire Algebra curriculum. Take small steps, and really try to understand each concept before moving on!