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OpenStudy (anonymous):
Charlie's piggy bank was filled with dimes and nickels. He took the money out and counted a total of 419 coins. The coins were worth $36.05. How many nickels were in the piggy bank?
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OpenStudy (anonymous):
x + y = 419 0.05x + 0.1y = 36.05 Solve where x is the number of nickels and y is the number of dimes.
OpenStudy (anonymous):
That's too hard. I really don't know how to solve that.
OpenStudy (anonymous):
How about this? x + y = 419 0.05x + 0.1y = 36.05 x + y = 419 20(0.05x + 0.1y = 36.05) x + y = 419 x + 2y = 721 Can you solve now?
OpenStudy (anonymous):
Yup, there were 117 nickels :)
OpenStudy (anonymous):
Thanks! (:
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OpenStudy (anonymous):
np :)
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