document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=386217>Question 386217</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Lily mixed a 45% copper sulfate solution and a 25% copper sulfate solution to get 100 mL of a 31% copper sulfate solution.  Haw many mL of the 25% solution did she use? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273035 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=273035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Lily mixed a 45% copper sulfate solution and a 25% copper sulfate solution to get 100 mL of a 31% copper sulfate solution. Haw many mL of the 25% solution did she use?<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "Quantity Eq::::  x + y = 100mL<BR>\n" );
document.write( "Copper Eq::::: 0.25x+0.55y = 0.31*100<BR>\n" );
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document.write( "Multiply Quantity by 55<BR>\n" );
document.write( "Multiply Copper by 100<BR>\n" );
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document.write( "55x  + 55y  =  55*100<BR>\n" );
document.write( "25x  + 55y  =  31*100<BR>\n" );
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document.write( "30x = 24*100<BR>\n" );
document.write( "x = 80mL (amt. of 25% solution needed in the mix)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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