There are 450 seats in the lower level of a concert hall with b balcony seats in the upper level. So far, 170 tickets have been sold, which is 1/5 if the total number of seats in the concert hall. How many balcony seats are in the concert hall?
+37171 1/5 x = 170 solve for x the total seats in the concert hall then x - 450 = balcony seats.
