SOLUTION: In a collection of dimes and quarters worth $9.00, the ratio of the number of dimes to the number of quarters is 5:7. How many coins are there in the collecton?
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Question 638334: In a collection of dimes and quarters worth $9.00, the ratio of the number of dimes to the number of quarters is 5:7. How many coins are there in the collecton? Answer by checkley79(3341) (Show Source):
You can put this solution on YOUR website! 5*.10x+7*.25x=9.00
.50x+1.75x=900
2.25x=9.00
x=9.00/2.25
x=4 is the multiplier.
5*4=20 number of dimes.
7*4=28 number of quarters.
PROOF:
20*.10+28*.25=9.00
2.00+7.00=9.00
9.00=9.00
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