document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=159103>Question 159103</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement?<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 #117223 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=117223\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement?<BR>\n" );
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document.write( "Let x = bags of 11% cement to be added<BR>\n" );
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document.write( "\"cement from 11%\" + \"cement from 12.5%\" = \"total cement in mix\"<BR>\n" );
document.write( ".11x + .125(10) = .12(10+x)<BR>\n" );
document.write( ".11x + 1.25 = 1.2 + .12x<BR>\n" );
document.write( "1.25 = 1.2 + .01x<BR>\n" );
document.write( ".05 = .01x<BR>\n" );
document.write( "5 bags = x </SPAN>\n" );
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