In this tutorial the instructor talks about various strategies for solving equations and inequalities involving absolute value. To do this the first step is to isolate an absolute value. An absolute value is exactly equal to a number. If that number is less than zero then there is no solution. So, if you have an absolute value that is less than a number it means that the real value lies in between negative and positive value of that number. If your number is less than zero then it is empty set. If absolute value is greater than number, then the real value is greater than the positive value of that number or is less than negative value of that number. This video shows how to solve equations and inequalities involving absolute value.
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