Khan Academy
Khan Academy: Two Step Equations Word Problems
Practice writing equations to model and solve real-world situations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Systems of Linear Equations in Two Var.
This tutorial will guide you through several tasks associated with systems of linear equations in two variables. Complete with definitions, problems with step-by-step solutions, and example exercises for you to complete and check.
Purple Math
Purplemath: Graphing Linear Equations: T Charts
A nice tutorial on how to graph linear equations. Goes through the process step by step and gives numerous examples.