SOLUTION: Giselle has $231 in $2 bills and $5 bills. There are 81 bills in total. How many $5 bills does she have?

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Question 1079273: Giselle has $231 in $2 bills and $5 bills. There are 81 bills in total. How many $5 bills does she have?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Giselle has $231 in $2 bills and $5 bills. There are 81 bills in total. How many $5 bills does she have?
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t + f = 81 --- # of bills
2t + 5f = 231 --- value of bills