SOLUTION: A cash register contains only five dollar and ten dollar bills. It contains twice as many five's as ten's and the total amount of money in the cash register is 540 dollars. How man

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Question 335411: A cash register contains only five dollar and ten dollar bills. It contains twice as many five's as ten's and the total amount of money in the cash register is 540 dollars. How many ten's are in the cash register?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let F be the number of $5 bills, T the number of $10 bills.
1.F=2T
.
.
.
2.5F%2B10T=540
Substitute eq. 1 into eq. 2,
5%282T%29%2B10T=540
10T%2B10T=540
20T=540
highlight%28T=27%29
Then from eq. 1,
F=2T
highlight%28F=54%29