Watch the video "Variables Expressions & Equations" on Khan Academy.
The video will be a review of what we discussed in class today.
Don't worry about the negative numbers, exponents, and square roots information he brings up towards the end of the video. We'll get to that stuff later. :)
Link: http://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/v/variables-expressions-and-equations
