1. The problem statement, all variables and given/known data Consider the block diagram below. Find the differential equation of the system. 2. Relevant equations None, other than understanding how block diagrams work. 3. The attempt at a solution My attempt is posted below, as an image. The reason I am having such trouble is because I can only express things in terms of the signal node I have labeled 'd'. Ideally, I should be able to find an expression just involving y(t) and x(t), and their derivatives/integrals.