You have 29 coins in your pocket, consisting of only pennies and nickels. The total value of the coins is $.85. How many pennies do you have?

Question

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Answer 1

p + n = 29

p + 5n = 85

 

p = 29 - n

p = 85 - 5n

 

29 - n = 85 - 5n

4n = 56

n = 14

 

p = 29 - 14

p = 15