document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=906799>Question 906799</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A mixture of 6% disinfectant solution is to be made from 7% and 4% disinfectant solutions. How much of each solution should be used if 21 gallons of 6% solution are needed?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #550045 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=550045\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a+b=21,<BR>\n" );
document.write( "0.07*a+0.04*b=0.06*21<BR>\n" );
document.write( "a=21-b<BR>\n" );
document.write( "0.07*(21-b)+0.04*b=1.26<BR>\n" );
document.write( "1.47-0.07b+0.04*b=1.26<BR>\n" );
document.write( "-0.03*b=-0.21<BR>\n" );
document.write( "b=7<BR>\n" );
document.write( "a=21-b<BR>\n" );
document.write( "a=14  gal at 7%<BR>\n" );
document.write( "b=7  gal at 4%<BR>\n" );
document.write( "check<BR>\n" );
document.write( "0.07*14+0.04*7=0.06*21<BR>\n" );
document.write( "0.98+0.28=1.26<BR>\n" );
document.write( "1.26=1.26<BR>\n" );
document.write( "ok<BR>\n" );
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