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You only need to solve for the number of either nickels or dimes. You can subtract that number from 86 to find the other. Since dimes are worth more, let's solve for dimes; we'll use the variable "d". First, make a chart of what we know:
# dimes = "d"; 0.10 each; total cents in dimes = 10d
# nickels = 86 - d, 0.05 each; total cents in nickels = 5(86-d)
Total number/value of coins: total number is 86; total value $6.90, or 690 cents
Now set up the equation:
10d + 5(86-d) = 690
10d + (5 . 86) + (5 . - d) = 690
10d + 430 - 5d = 690
5d + 430 = 690
5d + 430 - 430 = 690 - 430
5d = 260
(1/5)5d = 260 (1/5)
d = 52
If there are 52 dimes, there must be 34 nickels (86 - 52 = 34).
Let's check our work:
52 dimes = $5.20
34 nickels = $1.70
$5.20 + 1.70 = $6.90
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82
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13 nickels 7 dimes
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There are 250.
Nick has 35 coins consisting of dimes and nickels If the value of the coins is 3.10 then how many dimes does he have?
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A parking meter collected 10.40 in nickels and dimes if 63 of the coins are dimes how many were nickels?
82
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Ten dimes, fifteen nickels
George saves nickels and dimes for tolls. If he has 28 coins worth 2.60. how many are nickels and how many are dimes Answer this question by using system of equation?
George saves nickels and dimes for tolls. If he has 28 coins worth 2.60. how many are nickels and how many are dimes Answer this question by using system of equation?
Karen has 20 coins worth 1.35 the coins are all nickels and dimes how many of each coin does she have?
13 nickels 7 dimes
In a jar of coins the ratio of nickels to dimes is 57. If the jar contains 350 dimes how many nickels are there?
There are 250.
If Andy has 16 coins. Some of them are dimes and some are nickels. The combined value of his dimes and nickels is 1.35. How many dimes and nickels does he have?
11 dimes and 5 nickels.
If you have 5.80 in nickels and dimes and there are 73 coins in all how many dimes are there?
43
Pat has 3.80 in nickels and dimes. If there are 51 coins in all how many of them are nickels?
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Pat has 5 dollars and 80 cents in nickels and dimes If there are 73 coins in all how many of them are dimes?
43 dimes and 30 nickels
