SOLUTION: Math solution needing help!! A student makes a $9.75 purchase at the book store with a $20 bill. The store has no bills gives the change in quarters and fifty-cent pieces. Ther

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Question 375627: Math solution needing help!!
A student makes a $9.75 purchase at the book store with a $20 bill. The store has no bills gives the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there? How many quarters are there in the change___?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
A student makes a $9.75 purchase at the book store with a $20 bill. The store has no bills gives the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there? How many quarters are there in
...
purchase = $9.75
amount given = $20
balance to return = $10.25
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let quarters be x
fifty cent will be the balance = 30-x
...
25x+50(30-x)=1025 cents
25x+1500-50x=1025
-25x+1500 =1025
-1500
-25x=1025-1500
-25x=-475
/-25
x=19 quarters
50 cent pieces will be 30-19=11
...
Check
11*50+19*25= 10.25 = $10.25
...
m.ananth@hotmail.ca