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Dimes and Quarters total 3.55 There are 25 coins in all How many quarters are there?
Wiki User
∙ 14y ago
Work in cents.
10d + 25q = 355 and d + q = 25 so d = 25 - q
Substitute this last: 10(25 - q) + 25q = 355 ie 250 - 10q + 25q = 355
ie 15q = 105 so q = 7, making d = 18
Check: 7 x 25c + 18 x 10c = $1.75 + $1.80 = $3.55
And there you have it...
Wiki User
∙ 14y ago
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