SOLUTION: Kerry asked a bank teller to cash a $390 check using $20 bills and $50 bills. If the teller gave her a total of 15 bills, how many of each type of bill did she receive?

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Question 738793: Kerry asked a bank teller to cash a $390 check using $20 bills and $50 bills. If the teller gave her a total of 15 bills, how many of each type of bill did she receive?
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
T are $20 bills. F are $50 bills


T + F = 15 Equation 1


20T + 50F = 390 Equation 2


Eq 1: T = 15-F (plug that into equation 2)


20(15-F) + 50F = 390


300 - 20F + 50F = 390


30F = 90


F = 3


T = 15-F = 15-3 = 12

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