Is it possible to reuse environment variables in the Path environment variable from PowerShell?
There are some environment variables like %SystemRoot% defined and are used in Path variable ...;%SystemRoot%\system32;... viewed in the Advanced System Settings.
In PowerShell these are defined as $Env:SystemRoot and $Env:Path part of that path is resolved with ...;c:\windows\system32;...
How to create and use such a custom variable in the Path? e.g. $Env:MyPath = 'c:\mypath' adding it to Path like ...;%MyPath%\documents;... and get the same effect in both Advanced System Settings and PowerShell $Env:Path resolution?
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