SOLUTION: Tom has 12 coins in quarters and knickels. Their value is $2.20. How many coins of each type does he have?

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Question 392905: Tom has 12 coins in quarters and knickels. Their value is $2.20. How many coins of each type does he have?
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
Let's have x be the number of nickels so we can write the following equation:
.05x+.25(12-x)=2.20
Expand this out and multiply by 100 to get:
5x+300-25x=220
Combine like terms and subtract 300:
-20x=-80
Divide each side by -20 to get:
x=4
So we have 4 nickels and 8 quarters. Work it out to see if it does come to $2.20
Got it?
RJ
www.math-unlock.com