SOLUTION: In January 2013, a country's first-class mail rates increased to 55 cents for the first ounce, and 22 cents for each additional ounce. If Sabrina spent $22.11 for a total of 57 sta

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Question 1061086: In January 2013, a country's first-class mail rates increased to 55 cents for the first ounce, and 22 cents for each additional ounce. If Sabrina spent $22.11 for a total of 57 stamps of these two denominations, how many stamps of each denomination did she buy?
Answer by ikleyn(52794)   (Show Source): You can put this solution on YOUR website!
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In January 2013, a country's first-class mail rates increased to 55 cents for the first ounce, and 22 cents for each additional ounce.
If Sabrina spent $22.11 for a total of 57 stamps of these two denominations, how many stamps of each denomination did she buy?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

55n + 22(57-n) = 2211.


Simplify and solve for "n", the number of the first-class mail stamps.


Answer.  29 first-class mail stamps.  57-29 = 28 of 22 cent stamps .


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