Troy has 7 coins worth 20 cents. What are the coins?

Question

georgepahno · Answer

Let p = number of pennies, n = number of nickels, and d = number of dimes. 
 p + n + d = 7 
 p + 5n + 10d = 20 
 
 4n + 9d = 13 
 We see that n = d = 1, so p = 5. 
 Troy has 5 pennies, 1 nickel, and 1 dime. ;

Troy has 7 coins worth 20 cents. What are the coins?

Answer (1)

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