document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=473258>Question 473258</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a 70% acid solution is to be mixed with a 40% solution to get 90 gallons of a 50% solution<BR>\n" );
document.write( "how much gallons of solution is needed </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #324549 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=324549\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a 70% acid solution is to be mixed with a 40% solution to get 90 gallons of a 50% solution<BR>\n" );
document.write( "how much gallons of solution is needed<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.70x + 0.40(90-x) = 0.50*90<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "70x + 40*90 - 40x = 50*90<BR>\n" );
document.write( "50x = 10*90<BR>\n" );
document.write( "x = 18 gallons (amt. of 40% solution needed)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "90-18 = 72 gallons (amt. of 70% solution needed)<BR>\n" );
document.write( "=================================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "========== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );