document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=162791>Question 162791</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemist needs a saline solution that is 20% sodium chloride but only has solutions that are 15% and 40% sodium cholride. If the chemist measures 150mL of the 15% solution, how many milliliters of the 40% solution should she add to make a 20% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119990 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=119990\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .40X+.15(150-X)=.20*150<BR>\n" );
document.write( ".40X+22.5-.15X=30<BR>\n" );
document.write( ".25X=30-22.5<BR>\n" );
document.write( ".25X=7.5<BR>\n" );
document.write( "X=7.5/.25<BR>\n" );
document.write( "X=30 ML OF 40% SOLUTION IS USED.<BR>\n" );
document.write( "150-30=120 ML OF 15% SOLUTION IS USED.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( ".40*30+.15*120=.20*150<BR>\n" );
document.write( "12+18=30<BR>\n" );
document.write( "30=30 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );