I deleted too many system apps but I made backup.. My tablet stuck on android logo
If you backed up the apps you removed, you should be able to just adb push them back to the device OR copy/paste to the system app directory if that's available from Windows/Linux (etc) file explorer. Assuming all you did was delete some apk's.

If you didn't and you can find a stock rom, you might be able to do the same but instead getting the apk's from the rom.

Its possible that doing so may not work (depending on how the rom is set up and what you have available) and that you need to (re-)flash a rom (even just a dirty flash of the same rom or newer should get you back in).

But what you should have done was a full backup via adb, made sure there was a rom available for flashing, or installed a recovery and made a full backup before messing around in the system section. BACKUP backup backup!

A more direct answer may be obtained from the device thread on xda website where multiple people likely know the device well enough to get you through it.