document.write( "Question 614522: A student makes a $10.50 purchase at the bookstore with a $20 bill. The store has no bills and gives the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there?
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Algebra.Com's Answer #386903 by asuar010(338) $\"\"$ $\"About$

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let x be the number of quarters and y be the number of 50-cents pieces... then the change was 9.5 and the equations become $\"x%2By=30+and+0.25x%2B0.5y=9.5\"$ then $\"0.25%2830-y%29%2B0.5y=9.5\"$ then $\"7.5-0.25y%2B0.5y=9.5\"$ then $\"0.25y=2.5\"$ so y=8 and x=22
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