document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=864372>Question 864372</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me solve this problem<BR>\n" );
document.write( "how many ounces of pure water must be added to 5o ounces  of 15% saline solution to make a saline solution that is 10% salt? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #520946 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=520946\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = amount of pure water to add (in ounces)\r<BR>\n" );
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document.write( "We have 50 oz of a 15% saline solution. So we have 50*0.15 = 7.5 oz of pure saline out of 50 oz of the total solution.\r<BR>\n" );
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document.write( "So we have this fraction so far: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7.5%2F50 ALIGN=MIDDLE  ALT=\"7.5%2F50\"   DISABLED_style= \"max-width:90%; height:auto;\" > and that will equal 0.15 (which is 15%) since we have a 15% solution.\r<BR>\n" );
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document.write( "The numerator is the amount of pure saline. The denominator is the total amount of solution (saline + water)\r<BR>\n" );
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document.write( "We are adding some x ounces of pure water. So we'll be adding x just in the denominator only. We are NOT adding any pure saline.\r<BR>\n" );
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document.write( "So we end up with this fraction <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7.5%2F%2850%2Bx%29 ALIGN=MIDDLE  ALT=\"7.5%2F%2850%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and that fraction is forced to be equal to 0.10 since we want a 10% final saline solution. So we get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7.5%2F%2850%2Bx%29+=+0.10 ALIGN=MIDDLE  ALT=\"7.5%2F%2850%2Bx%29+=+0.10\"   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=7.5%2F%2850%2Bx%29+=+0.10 ALIGN=MIDDLE  ALT=\"7.5%2F%2850%2Bx%29+=+0.10\"   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=7.5+=+0.10%2850%2Bx%29 ALIGN=MIDDLE  ALT=\"7.5+=+0.10%2850%2Bx%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=7.5+=+5%2B0.10x ALIGN=MIDDLE  ALT=\"7.5+=+5%2B0.10x\"   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=7.5-5+=+0.10x ALIGN=MIDDLE  ALT=\"7.5-5+=+0.10x\"   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=2.5+=+0.10x ALIGN=MIDDLE  ALT=\"2.5+=+0.10x\"   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=2.5%2F0.10+=+x ALIGN=MIDDLE  ALT=\"2.5%2F0.10+=+x\"   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=25+=+x ALIGN=MIDDLE  ALT=\"25+=+x\"   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+=+25 ALIGN=MIDDLE  ALT=\"x+=+25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So you must add <font size=4 color=\"red\">25 ounces</font> of pure water. </SPAN>\n" );
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