After all, list created avd’s:
ANDROID_HOME or \AppData\Local\Android on Windows
c:\Users\YOUR_USER\AppData\Local\Android\sdk\tools\android.bat list avd
Name: Nexus_5X_API_26_x86
Device: Nexus 5X (Google)
Path: C:\Users\felansu\.android\avd\Nexus_5X_API_26_x86.avd
Target: Google APIs (Google Inc.)
Based on: Android 8.0 (Oreo) Tag/ABI: google_apis/x86
Skin: nexus_5x
Sdcard: 800M
Snapshot: no
Then can open the emulator with command:
c:\Users\YOUR_USER\AppData\Local\Android\sdk\tools\emulator -avd Nexus_5X_API_26_x86