Chapter 9
X’s Secret Identity: Solving Algebraic Equations
IN THIS CHAPTER
Using variables in equations
Knowing some quick ways to solve for x in simple equations
Understanding the balance scale method for solving equations
Rearranging and isolating terms in an algebraic equation
Removing parentheses from an equation
Cross-multiplying to remove fractions
In algebra, solving equations is the main event. Solving an algebraic equation means finding out which number the variable (usually x) stands for. Not surprisingly, this process is called solving for x, and when you know how to do it, your confidence in algebra will soar through the roof.
This chapter gives you a bunch of ways to solve equations for the elusive and mysterious x. First, I show you a few informal methods of solving for x. Then I show you how to solve more-difficult equations by thinking of them as a balance scale.
The ...
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