The question is: Compute the unit-impulse response h[n] for n=0,1,2,3 for each of the following discrete-time systems. Equation: y[n+1] + y[n] = 2x[n] I am trying to figure out how to solve this equation. I understand the example in the book but I don't understand what to do when it calls a future value (n+1) I rewrote the equation as: y[n]=2delta[n]-y[n+1] When n=0 delta[n] is 1 so: y=2*1-y<-----This is where I am getting confused. Doesn't y refer to my answer when I use the value n=1? How can I get a solution if each equation will refer to the next future equation? The example in the book uses y[n-1] so for each value of n it refers to the previous answer for y[n]. Any help would be much appreciated!!