SOLUTION: A bank teller was to cash a check for $260 with three times as many one-dollar bills as five's and half as many tens as five's. What denominations of cash should the teller have gi

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Question 175617: A bank teller was to cash a check for $260 with three times as many one-dollar bills as five's and half as many tens as five's. What denominations of cash should the teller have given?
Found 2 solutions by EMStelley, josmiceli:
Answer by EMStelley(208) About Me  (Show Source):
You can put this solution on YOUR website!
Call the number of five's F. Then there are 3F one-dollar bills and (1/2)F ten dollar bills. The dollar amount of fives is 5F, one's is 1(3)F and tens is 10(1/2)F. So
5F + 1(3)F + 10(1/2)F = 260
5F + 3F + 5F = 260
13F = 260
F = 20
20 Fives
60 Ones
10 Tens

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let d= number of 1's
Let f= number of 5's
Let t= number of 10's
given:
d+=+3f
t+=+f%2F2
d+%2B+5f+%2B+10t+=+260
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Substituting:
3f+%2B+5f+%2B+10%2A%28f%2F2%29+=+260
8f+%2B+5f+=+260
13f+=+260
f+=+20
since:
d+=+3f
d+=+60
and
t+=+f%2F2
t+=+10
The teller gave 60 1's, 20 5's, and 10 10,s
check:
3f+%2B+5f+%2B+10%2A%28f%2F2%29+=+260
3%2A20+%2B+5%2A20+%2B+10%2A%2820%2F2%29+=+260
160+%2B+100+=+260
260+=+260
OK