document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=210392>Question 210392</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many liters of 9% salt solution and 15% salt solution are needed to make 18 liters of 10% salt solution </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #158991 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=158991\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how many liters of 9% salt solution and 15% salt solution are needed to make 18 liters of 10% salt solution<BR>\n" );
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document.write( "n = 9%<BR>\n" );
document.write( "f = 15%<BR>\n" );
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document.write( "n+f = 18 liters<BR>\n" );
document.write( "0.09n + 0.15f = 0.1*18 (total of salt)<BR>\n" );
document.write( "9n + 15f = 180<BR>\n" );
document.write( "n = 18-f<BR>\n" );
document.write( "Sub for n<BR>\n" );
document.write( "9(18-f) + 15f = 180<BR>\n" );
document.write( "162 - 9f + 15f = 180<BR>\n" );
document.write( "6f = 18<BR>\n" );
document.write( "f = 3 liters<BR>\n" );
document.write( "n = 15 liters\r<BR>\n" );
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document.write( " </SPAN>\n" );
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