Hi all,

I have two recurrence equations and an algebric one that I would like to merge:

x1(n+1)=x1(n)+t*u(n)-t*x2(n)

x2(n+1)=x2(n)+t*y(n)/q(n)+t*d(n)/q(n)

y(n)=p1(n)*x1(n)+p2(n) *u(n)-p2(n)*x2(n)

I'd like to wright a single equation without x1 and x2, how to do that?

thanks