document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207844>Question 207844</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i do not know what to do on this problem.<BR>\n" );
document.write( "How much 40% antifreeze solution must be mixed with a 80% antifreeze solution to produce 20 gallons of a 70% disinfectant solution? Round answer to the nearest gallon.<BR>\n" );
document.write( "? gallons 40% solution, ? gallons 80% solution </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #157203 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=157203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .40x+.80(20-x)=.70*20<BR>\n" );
document.write( ".40x+16-.80x=14<BR>\n" );
document.write( "-.40x=14-16<BR>\n" );
document.write( "-.40x=-2<BR>\n" );
document.write( "x=-2/.40<BR>\n" );
document.write( "x=5 gal of 40% antifreeze is used.<BR>\n" );
document.write( "20-5=15 gal of 80% anti freeze is used.<BR>\n" );
document.write( "[5] gallons 40% solution, [15] gallons 80% solution<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( ".4*5+.8*15=.7*20<BR>\n" );
document.write( "2+12=14<BR>\n" );
document.write( "14=14 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );