#solve the second equation to find y2
k2 = desolve(diff(y2,x,1)  == 5*y1-y2, dvar = y2) # i have used k2 to denote y2
#use k2 to solve for y1
desolve(diff(y1,x,1)==2*y1+2*y2, dvar=y1)

SageDays/Kreyszig-3.3-2 (last edited 2010-08-11 12:40:29 by Abhi-akash)