SOLUTION: Janet has five fewer fifteen-cent stamps than twenty-cent stamps. If the total value of the stamps is $3.45, how many twenty-cent stamps does she have?
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Question 200290: Janet has five fewer fifteen-cent stamps than twenty-cent stamps. If the total value of the stamps is $3.45, how many twenty-cent stamps does she have? Answer by solver91311(24713) (Show Source):
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Let represent the number of 20 cent stamps. Then the number of 15 cent stamps must be . Represent the total value of the stamps as 345 cents so that we can work with integer coefficients.
The value of the 20 cent stamps is then and the value of the 15 cent stamps is then , and the sum of these two values is:
