Kevin has $6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of nickels is one less than twice the number of quarters. The value of the pennies is the same as the value of the nickels. How many of each Type of coin does he have?

Answer 1

dimes --- x
quarters --- 2x - 1
nickels -- 2(2x-1) -1 = 4x - 3
pennies = 5(4x-3) = 20x - 15

10x + 25(2x-1) + 5(4x-3) + 20x-15 = 645
10x + 50x - 25 + 20x - 15 + 20x - 15 = 645
100x = 700
x=7

7 dimes
13 quarters
25 nickels
125 pennies

Answer 2

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Answer 3

Samuel's bank has dimes and quarters in it. The number of dimes is four less than three times the number of quarters. If the total value of the coins is $7.85, how many dimes are in the piggy bank?