document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=538397>Question 538397</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An engineer wants to make a 40% cement mixture.   How many pounds of a 60% cement mixture must she mix with 12 pounds of a 30% mixture to create a 40% cement mixture?<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 #353172 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=353172\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An engineer wants to make a 40% cement mixture. How many pounds of a 60% cement mixture must she mix with 12 pounds of a 30% mixture to create a 40% cement mixture?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "cement + cement = cement<BR>\n" );
document.write( "0.60x + 0.30*12 = 0.40(x+12)<BR>\n" );
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document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "60x + 30*12 = 40x + 40*12<BR>\n" );
document.write( "20x = 10*12<BR>\n" );
document.write( "x = 6 lbs. (amt. of 60% mixture needed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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