document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=455272>Question 455272</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how much pure acid should be mixed with 6 gallons of a 50%  acid solution to get a 70% acid solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #312571 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=312571\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how much pure acid should be mixed with 6 gallons of a 50% acid solution to get a 70% acid solution?<BR>\n" );
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document.write( "Eqquation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "x + 0.50(6) = 0.70(x+6)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "100x + 50*6 = 70x + 70*6<BR>\n" );
document.write( "30x = 20*6<BR>\n" );
document.write( "x = 4 gallons (amt. of pure acid 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" );