document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=380366>Question 380366</A>: <I><SPAN STYLE=\"word-break: break-all;\"> PLEASE HELP. \r<BR>\n" );
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document.write( "A student makes a $9.50 purchase at the bookstore with a $20 bill. The store has no bills and given the change in quarters and fifty cent prices. There are 30 coins in all. How many of each kind are there?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #269932 by </B><A HREF=/tutors/aboutme.mpl?userid=Jk22><B>Jk22(389)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Jk22><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Jk22><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=269932\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let f be the number of fifty cents coins, then there are (30-f) quarter, we shall have : \r<BR>\n" );
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document.write( "f*0.5+(30-f)*.25 = (20-9.5) = 10.5$<BR>\n" );
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document.write( "f/2 + 30/4 - f/4 = 10.5<BR>\n" );
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document.write( "f/4 = 21/2 - 30/4 = (42 - 30)/4<BR>\n" );
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document.write( "f = 12 coins of fifty cents and 18 coins of a quarter $.\r<BR>\n" );
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