SOLUTION: A cinema has 2340 seats. All of the rows of seats in the cinema have either 50 seats or 45 seats. If there are three times as many rows with 50 seats as those with 45 seats, find t

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A cinema has 2340 seats. All of the rows of seats in the cinema have either 50 seats or 45 seats. If there are three times as many rows with 50 seats as those with 45 seats, find t      Log On


   

Question 831781: A cinema has 2340 seats. All of the rows of seats in the cinema have either 50 seats or 45 seats. If there are three times as many rows with 50 seats as those with 45 seats, find the total number of rows in the cinema.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
50x+45y=2340,
x=3y
x = 36, y = 12
total 48