document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=651004>Question 651004</A>: <I><SPAN STYLE=\"word-break: break-all;\">  	<BR>\n" );
document.write( "A certain metal is 40% copper. How many kilograms of this metal must be mixed with 60 kilograms of a metal that is 70% copper to get a metal that is 50% copper? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #407525 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=407525\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+ ALIGN=MIDDLE  ALT=\"+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = kg of 40% metal needed<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.4x+ ALIGN=MIDDLE  ALT=\"+.4x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = kg of copper in 40% metal<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.7%2A60+=+42+ ALIGN=MIDDLE  ALT=\"+.7%2A60+=+42+\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg of copper in 70% metal<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+.4x+%2B+42+%29+%2F+%28+x+%2B+60+%29+=+.5+ ALIGN=MIDDLE  ALT=\"+%28+.4x+%2B+42+%29+%2F+%28+x+%2B+60+%29+=+.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.4x+%2B+42+=+.5%2A%28+x+%2B+60+%29+ ALIGN=MIDDLE  ALT=\"+.4x+%2B+42+=+.5%2A%28+x+%2B+60+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.4x+%2B+42+=+.5x+%2B+30+ ALIGN=MIDDLE  ALT=\"+.4x+%2B+42+=+.5x+%2B+30+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.1x+=+12+ ALIGN=MIDDLE  ALT=\"+.1x+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+120+ ALIGN=MIDDLE  ALT=\"+x+=+120+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "120 kg of the 40% metal are needed<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+.4%2A120+%2B+42+%29+%2F+%28+120+%2B+60+%29+=+.5+ ALIGN=MIDDLE  ALT=\"+%28+.4%2A120+%2B+42+%29+%2F+%28+120+%2B+60+%29+=+.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+48+%2B+42+%29+%2F+180+=+.5+ ALIGN=MIDDLE  ALT=\"+%28+48+%2B+42+%29+%2F+180+=+.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+90%2F180+=+.5+ ALIGN=MIDDLE  ALT=\"+90%2F180+=+.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+90+=+.5%2A180+ ALIGN=MIDDLE  ALT=\"+90+=+.5%2A180+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+90+=+90+ ALIGN=MIDDLE  ALT=\"+90+=+90+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );