SOLUTION: Yuri has a total of 8 dimes and quarters. If the value of the coins is $1.55, how many quarters does he have?

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Question 290873: Yuri has a total of 8 dimes and quarters. If the value of the coins is $1.55, how many quarters does he have?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Yuri has a total of 8 dimes and quarters. If the value of the coins is $1.55, how many quarters does he have?
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Equations:
Quantity: d + q = 8
Value Eq:10d + 25q = 155 cents
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Multiply thru 1st by 10
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10d + 10q = 80
10d + 25q = 155
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Subtract 1st from 2nd and solve for "q":
15q = 75
q = 5 (# of quarters)
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Cheers,
Stan H.