Fiona and Iliana went to a going-out-of-business sale at a local video store. The store was advertizing all HD videos on sale fo
r one price and all classic videos for a different price. Fiona bought 5 HD videos and 2 classic videos for $31. Iliana bought 5 classic videos and 3 HD videos for $30. Which system of equations can be used to find the prices of the classic and HD videos?