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Alpha Teach Yourself Algebra I in 24 Hours by Jane Cook

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Hour 20
Solving Inequalities: Absolute Value
The properties that helped you solve equations were also very useful in solving inequalities in the previous hour. Graphing the solutions on a number line made the infinite number of possible values for the variables easier to see. The number line is also convenient when you are working with absolute value, an algebraic way of finding how far a number is from 0.
 
This hour, you will see how to find the solution of equations and inequalities that include absolute value. The problems will be limited to single variable expressions, as they were in the last hour, and you’ll see that most of the same properties you already know are used in these higher-level types of equations and inequalities.

Solving ...

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