Answer: 6
Mark the locations -6 and 0 on the number line. Note that going from -6 to 0, or vice versa, will take exactly 6 steps. Put another way, the distance between 0 and -6 is 6 units. Absolute value represents distance, so it is never negative.
We say
![|-6| = 6](https://img.qammunity.org/2021/formulas/mathematics/middle-school/mxjy80cfn3rrbvzk2ndyft1g01okx2i065.png)
Effectively, all we're doing is removing the negative sign.