In January 2013 , a country's first -class mail rates increased to 48 cents for the first ounce, and 22 cents for each additional ounce. If Sabrina spent $18.42 for a total of 53 stamps of these two denominations, how many stamps of each denomination did she buy?

Answer rating: 100% (QA)

Let x be the number of stamps of the first denomination 48 cents and y be the n... View the full answer