Kim decides to download some new music. he downloaded 6 albums and 7 singles, and his total was $68. the next day she purchased more music from the same retailer and downloaded 2 more albums and 9 singles for a total of $36. assuming that all albums and singles are the same price, how much did he spend on each album and each single? write a system of equations to represent this situation. then solve for the solution using the elimination method.