document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=60955>Question 60955</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A contractor mixes concrete from bags of pre-mix.  How many bags with 10% cement should he mix with 8 bags of 12.5 cement to produce a mix of 11% cement?\r<BR>\n" );
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document.write( "Please help - I'm stuck. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #41897 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=41897\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x=the number of bags of 10% cement\r<BR>\n" );
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document.write( "We know that the amt of pure cement in the unknown number of bags (x)(.10) plus amt of pure cement in the 8 bags (8)(.125) must equal the amt of pure cement in the final mixture (x+8)(.11).  Thus, the equation to solve is:\r<BR>\n" );
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document.write( ".10x+(8)(.125)=(x+8)(.11) simplifying, we get:<BR>\n" );
document.write( ".10x+1=.11x+.88 further simplifying, we have:<BR>\n" );
document.write( ".01x=.12 or<BR>\n" );
document.write( "x=12 bags\r<BR>\n" );
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document.write( "Hope this helps -----ptaylor\r<BR>\n" );
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