document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1086552>Question 1086552</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemical store room has a 90% acid solution and 40% solution. How many CENTILITERS of the 90% solution should be added to 50 CENTILITERS of the 40% solution to yield up a 50% solution? \r<BR>\n" );
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document.write( "p.s. i caps the centiliters for clearer comprehension. Thank you sir/maam tutors! :)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #700779 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=700779\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=\"black\" face=\"times\" size=\"3\">Let x = amount of the 90% acid solution (in centiliters)\r<BR>\n" );
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document.write( "We have 50 centiliters of the 40% solution. <BR>\n" );
document.write( "This means we have 0.4*50 = 20 centiliters of pure acid\r<BR>\n" );
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document.write( "We're adding on x more centiliters of the 90% solution. <BR>\n" );
document.write( "There are an additional 0.9*x centiliters of pure acid. \r<BR>\n" );
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document.write( "In total, we have 0.9*x+20 centiliters of pure acid.\r<BR>\n" );
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document.write( "This is out of x+50 centiliters of solution. \r<BR>\n" );
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document.write( "Divide the expressions 0.9*x + 20 over x+50 to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.9%2Ax+%2B+20%29%2F%28x%2B50%29 ALIGN=MIDDLE  ALT=\"%280.9%2Ax+%2B+20%29%2F%28x%2B50%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. <BR>\n" );
document.write( "This fraction represents the ratio of pure acid to total solution. <BR>\n" );
document.write( "We want this ratio to be equal to 50%. <BR>\n" );
document.write( "This is because we want the final solution to be 50% acid\r<BR>\n" );
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document.write( "So set <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.9%2Ax+%2B+20%29%2F%28x%2B50%29 ALIGN=MIDDLE  ALT=\"%280.9%2Ax+%2B+20%29%2F%28x%2B50%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > equal to 0.50 to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.9%2Ax+%2B+20%29%2F%28x%2B50%29+=+0.50 ALIGN=MIDDLE  ALT=\"%280.9%2Ax+%2B+20%29%2F%28x%2B50%29+=+0.50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now solve for x\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.9%2Ax+%2B+20%29%2F%28x%2B50%29+=+0.50 ALIGN=MIDDLE  ALT=\"%280.9%2Ax+%2B+20%29%2F%28x%2B50%29+=+0.50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.9x+%2B+20+=+0.50%28x%2B50%29 ALIGN=MIDDLE  ALT=\"0.9x+%2B+20+=+0.50%28x%2B50%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.9x+%2B+20+=+0.50%28x%29%2B0.50%2A%2850%29 ALIGN=MIDDLE  ALT=\"0.9x+%2B+20+=+0.50%28x%29%2B0.50%2A%2850%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.9x+%2B+20+=+0.50x%2B25 ALIGN=MIDDLE  ALT=\"0.9x+%2B+20+=+0.50x%2B25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.9x+%2B+20-0.50x+=+0.50x%2B25-0.50x ALIGN=MIDDLE  ALT=\"0.9x+%2B+20-0.50x+=+0.50x%2B25-0.50x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.4x+%2B+20+=+25 ALIGN=MIDDLE  ALT=\"0.4x+%2B+20+=+25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.4x+%2B+20-20+=+25-20 ALIGN=MIDDLE  ALT=\"0.4x+%2B+20-20+=+25-20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.4x+=+5 ALIGN=MIDDLE  ALT=\"0.4x+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.4x%29%2F%280.4%29+=+%285%29%2F%280.4%29 ALIGN=MIDDLE  ALT=\"%280.4x%29%2F%280.4%29+=+%285%29%2F%280.4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+12.5 ALIGN=MIDDLE  ALT=\"x+=+12.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<font color=red>We need 12.5 (12 and a half) centiliters of the 90% solution. </font></font> </SPAN>\n" );
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