Every inequality has an inequality symbol and values or expressions on either side of this symbol. In this exercise, we have the phrase less than, so we can identify that the inequality symbol should be <.
... < ...
We need to use an inequality to express a distance away from a central point, so we need an absolute value inequality. We will use the most basic form of an absolute value equation.
| x- a|= b
In this format, a is the central point and b is the distance from the central point. Here we need an inequality for a central point 10 and a distance from point k to 10 of less than 3.
& A number $k$ is less than 3 units away from 10.
& | k - 10| < 3
