A town has 2 sneaker factories, Sneakerheadz and Nukicks. While Nukicks was closed on Sunday, Sneakerheadz made 900 pair of shoes. On Monday, both Sneakerheadz and Nukicks made shoes for the same amount of time. Sneakerheadz made sneakers at a rate of 300/hour and Nukicks at a rate of 480/hour. Nukicks made the same number of pairs of shoes on Monday as Sneakerheadz did on both days. Write and solve an equation in one variable to find out how many hours the sneaker factories operated on Monday