document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1011852>Question 1011852</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm a 66 year old man with a debate with my wife.  I say the mixture would be 4 to 1 she disagrees. A 40% solution is to be mixed with water how much water is needed to make the solution 10%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #627643 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=627643\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A 40% solution is to be mixed with water how much water is needed to make the solution 10%? <BR>\n" );
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document.write( "If it's a 40% solution, it is 60% water.<BR>\n" );
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document.write( "Assume you start with 100 gallons of the 40% solution.<BR>\n" );
document.write( "60 gallons of it must be water<BR>\n" );
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document.write( "You are going to add \"x\" gallons of the water to the solution.<BR>\n" );
document.write( "You now have (100+x) gallons of solution.<BR>\n" );
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document.write( "You want that to be a 10% solution.<BR>\n" );
document.write( "You have to solve for \"x\".<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "water + water = water<BR>\n" );
document.write( "60 gal + x gal = 0.90(100+x)<BR>\n" );
document.write( "60 + x = 90 + 0.9x<BR>\n" );
document.write( "0.1x = 30<BR>\n" );
document.write( "x = 300 (number of gallons of water you would have to add)<BR>\n" );
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document.write( "You started with 100 gallons of solution; 60 gallons was water<BR>\n" );
document.write( "You added 300 gallons of water so you have 400 gallons of solution<BR>\n" );
document.write( "40 gallons of active ingredient are still in the solution.<BR>\n" );
document.write( "And 40 is 10% of 400.<BR>\n" );
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document.write( "The original solution was 4 out of 10 or 2/5 active.<BR>\n" );
document.write( "The new solution is 4 out of 40 or 1/10 active<BR>\n" );
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document.write( "The mixture is now 10 inactive  to 1 active.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.  \r<BR>\n" );
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