A theater sells tickets for a concert. Tickets for lower-level seats sell for $55 each, and tickets for upper-level seats sell for $30 each. The theater sells 241 tickets for $9,355. How many tickets of each type were sold?
+36916 l = lower level seats money from lower level seats = $ 55 l
u = upper level seats = 241- l money from upper level seats $ 30 (241 -l ) summed = $ 9355
55 l + 30(241-l ) = 9355 solve for 'i' lower level seats , then upper level = 241 - l
