document.write( "Question 1158439: If it isn’t a bother, I would appreciate all the help I could get for this question; thank you and have a nice day! <3 \r
\n" ); document.write( "\n" ); document.write( "How much water should we add to 5 gallons of 18% acid solution to dilute it to a concentration of 10%?\r
\n" ); document.write( "\n" ); document.write( "We should add _ gallons of water to dilute the concetration. 
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Algebra.Com's Answer #781383 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
think of pure acid and add an unknown amount of water x
\n" ); document.write( "at the end there will be 5+x gallons at 10% or .5+.1x gallons of pure acid. \r
\n" ); document.write( "\n" ); document.write( "start with 5 gallons of 0.18, or 0.9 gallons of pure acid=0.5+.1x
\n" ); document.write( "so 0.4 gallons=0.1x
\n" ); document.write( "x=4 gallons\r
\n" ); document.write( "\n" ); document.write( "0.9 gallons of pure acid has a 10% concentration. That would require 9 gallons of solution in all
\n" ); document.write( "since 0.9/9 is 10%
\n" ); document.write( "That would mean add 4 gallons of water\r
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\n" ); document.write( "\n" ); document.write( "another way to look at it is that one is going from 18%/*5 to 10%*x and the new total is 9 gallons\r
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