document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=706055>Question 706055</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hal is doing a chemistry experiment that calls for a 30% solution of copper sulfate. Hal has 40mL of a 25% solution. How many milliliters of a 60% solution should Hal add to obtain the required 30% solution?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #434987 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=434987\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hal is doing a chemistry experiment that calls for a 30% solution of copper sulfate. Hal has 40mL of a 25% solution. How many milliliters of a 60% solution should Hal add to obtain the required 30% solution?<BR>\n" );
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document.write( "let x=amt of 60% solution to be added<BR>\n" );
document.write( "25%*40+60%x=30%(40+x)<BR>\n" );
document.write( ".25*40+.6x=12+.3x<BR>\n" );
document.write( "10+.6x=12+.3x<BR>\n" );
document.write( ".3x=2<BR>\n" );
document.write( "3x=20<BR>\n" );
document.write( "x=20/3<BR>\n" );
document.write( "amt of 60% solution to be added=20/3 ml </SPAN>\n" );
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