SOLUTION: The number of Peggy's 20 cents coins is 4 times that of her $5 coins. If the total amount of these coins is $17.40, how many 20 cents coins does she have?
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Question 189508: The number of Peggy's 20 cents coins is 4 times that of her $5 coins. If the total amount of these coins is $17.40, how many 20 cents coins does she have?
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Found 2 solutions by solver91311, feliz1965:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let x be the number of $5 coins. Then the number of 20 cent coins must be 4x.
When I do coin problems, I usually convert dollars and cents to just cents. Here, the total amount of money is 1740 cents, the $5 coins are worth 500 cents each, and the 20 cent coins are worth 20 cents each.
Since we have the quantity x of 500 cent coins, the total value of these coins must be 500x cents. Likewise, the total value of the 20 cent coins must be 20 X 4x or 80x cents.
Adding these two values together must give the total amount of money, so:
Solve for x to learn the number of $5 coins, and multiply that by 4 to get the number of 20 cent coins.
John
Answer by feliz1965(151) (Show Source): You can put this solution on YOUR website!
The number of Peggy's 20 cents coins is 4 times that of her $5 coins. If the total amount of these coins is $17.40, how many 20 cents coins does she have?
5 cent coins = 0.05x
20 cent coins = 4(0.05x)
0.05x + 4(0.05x) = 17.50
Can you finish now?
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