30/0.5+25=85 unless there is a catch
A bird has a head 9 cm long. The tail is equal to the size of the head plus a half of the size of the body. The body is the size of the head plus the tail.
How long is the bird?
A certain number is divided by five, seven is added and the result is quadrupled to get a number 15 higher than the original number.
What was the first number?