How do I can import Motion 5 proyects to Final Cut Pro X timeline?

Unless you send from FCX to Motion, you don't. What you do is export a QT file that you then import into FCX. That means every time you update it, you need to re-export.

Whoops, I'm wrong. YOu can't SEND TO Motion from FCX. So that means you can only render out your finals and bring those into FCX.

Next time, pose this on the FCX forum where people know what's what. This is for FCP 7 and earlier.

https://discussions.apple.com/community/professional_applications/final_cut_pro_ x