document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=474871>Question 474871</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You have 100 mL of 10% acid,how many mL of 100% acid do you need to add to make the solution 20%?\r<BR>\n" );
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document.write( "i don't know where to start. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #325662 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=325662\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You have 100 mL of 10% acid,how many mL of 100% acid do you need to add to make the solution 20%?<BR>\n" );
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document.write( "let x=ml of 100% acid to add<BR>\n" );
document.write( "10%(100)+100%x=20%(100+x)<BR>\n" );
document.write( "10+x=20+.2x<BR>\n" );
document.write( ".8x=10<BR>\n" );
document.write( "x=10/.8=12.5<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "amt of 100% acid to add=12.5 ml </SPAN>\n" );
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