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o-na [289]
3 years ago
7

Walter has 124 bills consisting of 5 dollar bills and 10 dollar bills. If his total amount of money is $840, how many bills of e

ach does he have?
Mathematics
1 answer:
Romashka [77]3 years ago
8 0
For this question here are the formulas,
Let T be the number of 10's
Let F be the number  5's

Let us find the 10's first by this formula.
<span>5(124 - T) + 10T = 840
</span>620-5T + 10T = 840
then
5T = <span>220
</span>5        5

T=44
<span>Now let's find the F using this formula.
</span>
5F + 10T = 840
Sustitute T 
5F + 10(44) = 840
<u>5F</u> = <u>400
</u>5         5
F = 80

to Check 
F + T = 124
80 + 44 = 124

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