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Start with the given inequality
Break up the absolute value (remember, if you have

, then

and

)

and

Break up the absolute value inequality using the given rule

Combine the two inequalities to get a compound inequality
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Answer:
So our answer is
So the answer in interval notation is
[
]
Also, the answer in set-builder notation is
Here's the graph of the solution set on a number line:

Graph of the solution set
Note:
There is a
closed circle at

which means that we're including this value in the solution set
Also, there is a
closed circle at

which means that we're including this value in the solution set.