Good day R  list

I want to  transform an autoregressive distributed lag  (ARDL)  to a
long-run equation

(reparametrization of the (ARDL). How could i do that?

This equation is displayed in this link


https://docs.google.com/file/d/0B4dAkTAHpGBDSjA4RmlnbkxoLVU/edit
Many thanks in advance

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