As the girl walked on, she met another man.
“That’s a good-sized fish,” said the man. “How long is it?”
“Well,” said the girl, “the head is four inches. The tail is as long as the head plus half the length of the body. And the body is exactly as long as the head and tail together.”
How long was the fish?
so, what have they told you?
h = 4
t = h + b/2
b = h+t
t = 4 + b/2
b = 4+t
b = 4 + 4+b/2
b = 8
b+h+t = 16