document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=147292>Question 147292</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemist needs to mix 20 liters of 40% salt solution with some 70% solution to get a mixture that is 50% salt. How many liters of 70% solution should be used? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #107662 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=107662\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In words:<BR>\n" );
document.write( "(amount of salt you end up with) / (total amount of solution) = % salt<BR>\n" );
document.write( "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;\" > = amount of 70% solution to be added<BR>\n" );
document.write( "How much salt is in the 20 liters of 40% solution?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.4+%2A20+=+8 ALIGN=MIDDLE  ALT=\"+.4+%2A20+=+8\"   DISABLED_style= \"max-width:90%; height:auto;\" > liters<BR>\n" );
document.write( "How much salt is in the 70% solution?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.7x ALIGN=MIDDLE  ALT=\".7x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "How much total solution do you end up with?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20+%2B+x ALIGN=MIDDLE  ALT=\"20+%2B+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So, the equation to use is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%288+%2B+.7x%29+%2F+%2820+%2B+x%29+=+.5 ALIGN=MIDDLE  ALT=\"%288+%2B+.7x%29+%2F+%2820+%2B+x%29+=+.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20+%2B+x ALIGN=MIDDLE  ALT=\"20+%2B+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8+%2B+.7x+=+.5%2A%2820+%2B+x%29 ALIGN=MIDDLE  ALT=\"8+%2B+.7x+=+.5%2A%2820+%2B+x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8+%2B+.7x+=+10+%2B+.5x ALIGN=MIDDLE  ALT=\"8+%2B+.7x+=+10+%2B+.5x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.2x+=+2 ALIGN=MIDDLE  ALT=\".2x+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+10 ALIGN=MIDDLE  ALT=\"x+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The chemist needs to add 10 liters of the 70% solution<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%288+%2B+.7x%29+%2F+%2820+%2B+x%29+=+.5 ALIGN=MIDDLE  ALT=\"%288+%2B+.7x%29+%2F+%2820+%2B+x%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=%288+%2B+.7%2A10%29+%2F+%2820+%2B+10%29+=+.5 ALIGN=MIDDLE  ALT=\"%288+%2B+.7%2A10%29+%2F+%2820+%2B+10%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=%288+%2B+7%29+%2F+30+=+.5 ALIGN=MIDDLE  ALT=\"%288+%2B+7%29+%2F+30+=+.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F30+=+.5 ALIGN=MIDDLE  ALT=\"15%2F30+=+.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15+=+.5%2A30 ALIGN=MIDDLE  ALT=\"15+=+.5%2A30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15+=+15 ALIGN=MIDDLE  ALT=\"15+=+15\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );