Question 466330: Theresa has $1.75 in quarters and nickles. If she has 15 coins total, how many quarters does Theresa have?
Thank you! Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Theresa has $1.75 in quarters and nickles. If she has 15 coins total, how many quarters does Theresa have?
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Quantity Eq: n + q = 15 coins
Value Eq: 5n+25q = 175 cents
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Divide thru the Value Eq. by 5.
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n + q = 15
n +5q = 35
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Subtract and solve for "q":
4q = 20
q = 5 (# of quarters)
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Solve for "n":
n + q = 15
n + 5 = 15
n = 10 (# of nickels)
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Cheers,
Stan H.
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