This is the first of three TI-Nspire documents on solving linear equations. This document introduces the concepts of true, false and open sentences, and the method of Guess-Check-Refine for solving linear equations.

**Cups and Blobs with the TI-Nspire** (see below) is an interactive introduction to the Balance Method of solving linear equations, which is then followed by **Equation Solver with the TI-Nspire** (see below).

All that is missing is a TI-Nspire document that demonstrates the Backtracking Method for solving Linear Equations. Any takers :-) ?