SOLUTION: I have three times as many 20-cent coins as 10-cent coins. Their total value is $4.20. How many 10-cent coins do I have?

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Question 849885: I have three times as many 20-cent coins as 10-cent coins. Their total value is $4.20. How many 10-cent coins do I have?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I have three times as many 20-cent coins as 10-cent coins. Their total value is $4.20. How many 10-cent coins do I have?
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3 20's and 1 10 make a set worth 70 cents.
420/70 = 6 sets
--> 18 20's and 6 10's