document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1170291>Question 1170291</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You have 20 gallons of a 45% antifreeze solution. How many gallons of a 57% antifreeze solution needs to be added to make a 51% antifreeze solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #795147 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=795147\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Short answer....<br><BR>\n" );
document.write( "51% is exactly halfway between 45% and 57%, so the two ingredients need to be mixed in equal amounts.<br><BR>\n" );
document.write( "ANSWER: 20 gallons.<br><BR>\n" );
document.write( "With formal algebra....<br><BR>\n" );
document.write( "45% of 20 gallons, plus 57% of x gallons, makes 51% of (20+x) gallons:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.45%2820%29%2B.57%28x%29+=+.51%2820%2Bx%29 ALIGN=MIDDLE  ALT=\".45%2820%29%2B.57%28x%29+=+.51%2820%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Solve using basic algebra....<br><BR>\n" );
document.write( " </SPAN>\n" );
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