A rectangular bird feeder costs 18 point 00 dollars A cylindrical bird feeder costs 24 point 00 dollars The expected cost to keep the rectangular bird feeder filled is 3 point 00 dollars per week. The expected cost to keep the cylindrical bird feeder filled is 2 point 00 dollars per week. The equation models the break-even point. 18 plus 3 x is equal to 24 plus 2 x What does x represent?