What is the equation equivalent to?

To turn  into an absolute value inequality we do the following:
First get the average between 1.3 and 2.1. To do this we add 1.3 to 2.1 and then divide by two.

Now that we have the average we can start to create the absolute inequality 

Insert our average in the middle

Subtract subtract 1.3 from 1.4  and 1.4 from 2.1 which both will  = 0.4. Now setup your absolute value.
 

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