Question 305719
A theater has twice as many seats in the main area as in the balcony and it has 20 less seats on the floor than in the balcony. If there are 300 seats in the theater, how many seats are in each area?

let the number of seats in the balcony be x

main area it has 2x

floor it has x-20

x+2x+x-20=300

4x-20=300

4x=  320
x= 80  balcony seats

main area = 2x =160 seats

floor area = x-20 = 80-20=60 seats