Let x = price of a standard ticket, y = price of a matinee ticket, and z = price of a senior ticket. 150x + 80y + 12z = 2,466380x + 95y + 48z = 5,419210x + 130y + 60z = 3,960 220x + 225y = 4,445540x + 270y = 8,370 → y = −2x + 31 x = 11