SOLUTION: When changing a $20 bill, Marilyn received 4 more $1 bills than three times the number of $5 bills. How many $1 bills did she receive?

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Question 251711: When changing a $20 bill, Marilyn received 4 more $1 bills than three times the number of $5 bills. How many $1 bills did she receive?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
5f+o=20
3f+4=o