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John has 13 coins They all quarters or dimes The total amount is 2.50 How many quarters does he have?
Wiki User
∙ 14y ago
Quarters = x
Dimes = 13 - x
(.25)x + (.10)(13 - x) = 2.50
.25x + 1.3 - .1x = 2.5
.15x + 1.3 = 2.5
.15x = 1.2
15x = 120
x = 120 / 15
x = 8
8 quarters = $2.00
5 dimes (13 - x) = $0.50
Total = $2.50
Wiki User
∙ 14y ago
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John has a total of 13 coins in his pocket Of the 13 coins they are all either quarters or dimes The total value of the coins is 250 How many dimes does John have in his pocket?
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John has a total of 13 coins in his pocket Of the 13 coins they are all either quarters or dimes The total value of the coins is 250 How many dimes does John have in his pocket?
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