Describe all the x -values at a distance of 20 or less from the number 7

Question

I need to put all the x-values at a distance of 20 or less from the number 7 in interval notation. I'm not sure if I 7 would count as one or if I need to stop at 6 and then put a union and start back up at 8.

Answer 1

|x-7|≤20

-20≤x-7≤20

-13≤x≤27

[-13,27]