There were 170 people at the concert if 85% of the seats were filled how many seats are in the auditorium

170/x = 85/100 
17000=85x
divide both sides by 85
x=200
200 is the seats in the auditorium

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