Two pools are being filled with water. To start, the first pool had 728 liters of water and the second pool was empty. Water is being added to the first pool at a rate of 23 liters per minute. Water is being added to the second pool at a rate of 37 liters per minute. Let x be the number of minutes water has been added. Write an equation to show when the two pools would have the same amount of water. You do NOT need to solve this.