document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=726776>Question 726776</A>: <I><SPAN STYLE=\"word-break: break-all;\"> To the nearest mL, how much 0.3% ampicillin in solution do you have to add to 40 mL of 0.5% ampicillin in solution to create 0.4% ampicillin in solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #444783 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=444783\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To the nearest mL, how much 0.3% ampicillin in solution do you have to add to 40 mL of 0.5% ampicillin in solution to create 0.4% ampicillin in solution?<BR>\n" );
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document.write( "Since 0.4 is the average of 0.5 & 0.3, it's an equal amount = 40 ml<BR>\n" );
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document.write( "40*0.5 + x*0.3 = (40 + x)*0.4<BR>\n" );
document.write( "40*5 + 3x = 4*(40 + x)<BR>\n" );
document.write( "200 + 3x = 160 + 4x<BR>\n" );
document.write( "x = 40 ml of 0.3% </SPAN>\n" );
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