SOLUTION: Nina has $5 bills and $10 bills in her wallet. She has a total of 7 bills with a value of $55. How many of each type of bill does she have?

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Question 944995: Nina has $5 bills and $10 bills in her wallet. She has a total of 7 bills with a value of $55.
How many of each type of bill does she have?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
F - number of $5 bills
T - number of $10 bills
.
.
1.F%2BT=7
.
.
5F%2B10T=55
2.F%2B2T=11
Subtract eq. 1 from eq. 2,
F%2B2T-F-T=11-7
T=4
Then,
F%2B4=7
F=3