document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=405972>Question 405972</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many ounces of pure zinc must be added to 20 ounces of brass which is 30% zinc and 70% copper to produce brass that is 40% zinc? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #286608 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=286608\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> percent	----------------	quantity		<BR>\n" );
document.write( "30	----------------	20  brass<BR>\n" );
document.write( "100	----------------	x    Zinc<BR>\n" );
document.write( "40	----------------	20+x  Mixture\r<BR>\n" );
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document.write( "30*20+100*x=40(20+x)<BR>\n" );
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document.write( "600+100	x=800+40x				<BR>\n" );
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document.write( "100x-40x=800-600					<BR>\n" );
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document.write( "60x=200										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "/60													<BR>\n" );
document.write( "x=3.33	ounces of pure Zinc									<BR>\n" );
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