document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=462097>Question 462097</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many litres of 10% solution of acid should be added to 20 litres of a 60% solution of acid to obtain a 50% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #316815 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=316815\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how many litres of 10% solution of acid should be added to 20 litres of a 60% solution of acid to obtain a 50% solution?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.10x + 0.60*20 = 0.50(x+20)<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "10x + 60*20 = 50x + 50*20<BR>\n" );
document.write( "40x = 10*20<BR>\n" );
document.write( "x = 5 litres (amt. of 10% solution needed)<BR>\n" );
document.write( "=============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );