SOLUTION: "a wallet contains $5 bills and $10 bills. There are 15 bills in the wallet with a total value of $120. find the number of $5 bills and $10 bills" Im having trouble figuring this
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Question 219989: "a wallet contains $5 bills and $10 bills. There are 15 bills in the wallet with a total value of $120. find the number of $5 bills and $10 bills" Im having trouble figuring this problem out can u show me how to set it up and solve?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
"a wallet contains $5 bills and $10 bills. There are 15 bills in the wallet with a total value of $120. find the number of $5 bills and $10 bills"
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Quantity Equation: f + t = 15 bills
Value Equation::::5f +10t = 120 dollars
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Multiply thru the Quantity Eqution by 5 to get:
5f + 5t = 75
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Subtract that Eq. from the Value equation and solve for "t":
5t = 45
t = 9 ($ of ten dollar bills)
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Since f+t = 15, f +9 = 15, and f = 6 (# of 5 dollar bills)
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Cheers,
Stan H.
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