Given this ode system:

x' = 2x+y-7e^(-t) -3

y'= -x+2y-1

Find all the bounded soloution in [a,infinity) when a is a real number...

I'm not realy sure what is a sufficient condition for bounded soloution in this question...Maybe there's something we can do and then we will not even need to solve the system...

Help is Needed!!

TNX a lot!