86.1.3 Analysis of Block Diagrams Substituting the last two relations in the first four equations we get WiX-azW3 W2=W1-8TW2 W3=zW2+EW2 Y=BWI+yTW3 From the second equation we get W2=W1/(1+8z) and from the third equation we get W3=(E+z)W2§6.1.3 Analysis of Block Diagrams • Substituting the last two relations in the first four equations we get W1=X- z -1 W3 W2= W1 -  z -1 W2 W3= z-1 W2 + W2 Y= W1 +  z -1 W3 • From the second equation we get W2= W1 /(1+ z -1 ) and from the third equation we get W3=( + z -1 )W2