SOLUTION: A wallet contains $2.20 in coins (nickels and dimes). If there are 32 coins in total, how many of them are nickels?
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Question 364017: A wallet contains $2.20 in coins (nickels and dimes). If there are 32 coins in total, how many of them are nickels?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A wallet contains $2.20 in coins (nickels and dimes). If there are 32 coins in total, how many of them are nickels?
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Quantity Eq.::: n + d = 32 coins
Value Eq:::::: 5n+10d = 220 cents
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Multiply thru Quantity Eq. by 5 to get:
5n+5d = 5*32
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Subtract that from the Value Eq and solve for "d":
5d = 220-5*32
5d = 60
d = 12 (# of dimes)
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Since n+d = 32, n = 20 (# of nickels)
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Cheers,
Stan H.
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