Question

A bird leaves its nest and travels 20 miles per hour downwind for x hours. On the return trip, the bird travels 4 miles per hour slower and has 6 miles left after x hours.

Answer 1

$x = d/20 x = (d - 6)/(16)$

$d/20 = (d - 6)/16$

$20d - 120 = 16d -120 = -4d 30 = d$

$60 miles.$