##### Subchapters

- Exploring Variables and Combining Like Terms
- Simplifying Expressions by Combining Like Terms
- Writing Algebraic Expressions
- Using Zero to Simplify Algebraic Expressions
- Using Algebra Tiles to Simplify Algebraic Expressions
- Using Algebra Tiles to Compare Expressions
- Simplifying and Recording Work
- Using Algebra Tiles to Solve for x
- More Solving Equations
- Appendix Closure