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?

Question

anonymous · Answer

x + y = 419
0.05x + 0.1y = 36.05
Solve where x is the number of nickels and y is the number of dimes.

anonymous · Answer

That's too hard. I really don't know how to solve that.

anonymous · Answer

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?

anonymous · Answer

Yup, there were 117 nickels :)

anonymous · Answer

Thanks! (:

anonymous · Answer

np :)