document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=919461>Question 919461</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many gallons of 15% alcohol solution and 45% alcohol solution must be mixed to get 9 gallons of 25% alcohol solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #557734 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=557734\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We need a total of 9 gal at 25%<BR>\n" );
document.write( "We want to know how many gal at 15% to mix with 45%<BR>\n" );
document.write( "a+b=9,<BR>\n" );
document.write( "0.15*a+0.45*b=0.25*9<BR>\n" );
document.write( "a=9-b<BR>\n" );
document.write( "0.15*(9-b)+0.45*b=2.25<BR>\n" );
document.write( "1.35-0.15b+0.45*b=2.25<BR>\n" );
document.write( "0.3*b=0.9<BR>\n" );
document.write( "b=3<BR>\n" );
document.write( "a=9-b<BR>\n" );
document.write( "a=6 gal at 15%<BR>\n" );
document.write( "b=3 gal at 45%<BR>\n" );
document.write( "check<BR>\n" );
document.write( "0.15*6+0.45*3=0.25*9<BR>\n" );
document.write( "0.9+1.35=2.25<BR>\n" );
document.write( "2.25=2.25<BR>\n" );
document.write( "ok<BR>\n" );
document.write( "codemx1<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );