A fish has a head 9" long. The tail is equal to the size of the head plus one-half the size of the body. The body is the size of the head plus the tail."
How long is the fish?
27" - 54" - 63" - 72" - 81"


H=9, T=9+b/2, B=H+T+B/2 or B=9+9+b/2 0r b=36
Fish length= H+t+b or 9+(9+18)+36=72



how b comes 36??