|x| meaning how much is from x to 0 so for example |4| = 4 and |-10| = 10 ( it could never be a negative) but when the - is on the outside of the two lines then it turns to a negative like for example:
|23|= 23
But then…
-|23|=-23
^because anything that is out of the two lines doesn't mean distance from that number to 0 only the ones inside