document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=221852>Question 221852</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A pharmacist is to prepare 15 liters of eye drops.  eye drop solution must have a 4% active ingredient, but the pharmacist only has 10% solution and 2% solution in stock.  How much of the 10% soulution should be used to fill the prescription? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166270 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=166270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A pharmacist is to prepare 15 liters of eye drops. eye drop solution must have a 4% active ingredient, but the pharmacist only has 10% solution and 2% solution in stock. How much of the 10% soulution should be used to fill the prescription?<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "active + active = active<BR>\n" );
document.write( "0.10x + 0.02(15-x) = 0.04*15<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "10x + 2*15 - 2x = 4*15<BR>\n" );
document.write( "10x = 2*15<BR>\n" );
document.write( "x = 3 liters (amount of 10% solution needed in the mixture)<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );