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 o
f money in the cash register is 640 dollars. How many ten's are in the cash register?
1 answer:
Answer:
Let the number of five's = 2x = 2x × 5 = 10x
Then the number of ten's = x = x × 10 = 10x
10x + 10x = 640
20x = 640
x = 32
There are 32 ten dollar bills.
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