Two birds are building a nest. Bird a is flying toward the nest at the same time bird b is flying away from it

That they are numbers and related to each other.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8