/Users/[Username]/Library/Android/sdk
Homebrew is a handy tool for installing applications on OS X that aren't available in the app store. The downside is having a package manager handle another package manager with different opinions on architecture gets hairy, and your NPM installation will have reliability issues in the future if you install Node with Homebrew. However if you're on Windows you shouldn't have an issue using Chocolatey.
The most robust way to install Node is by installing it under NVM (Node Version Manager). If you already have NVM, or have a version of Node 4+ installed from other means (not Homebrew), you can skip to Step 2.
You can uninstall an existing version of node by following the advice in this gist, supplied for brevity here: