document.write( "Question 403826: A 20 gallon solution contains 50% salt. How much pure water needs to be added in it to get a solution that contains 30% salt? \n" ); document.write( "

Algebra.Com's Answer #285488 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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A 20 gallon solution contains 50% salt.
\n" ); document.write( " How much pure water needs to be added in it to get a solution that contains 30% salt?
\n" ); document.write( ":
\n" ); document.write( "Let w = amt of water required
\n" ); document.write( "The actual amt of salt will stay the same, only the percent changes
\n" ); document.write( ".50(20) = .30(w + 20)
\n" ); document.write( "10 = .3w + 6
\n" ); document.write( "10 - 6 = .3w
\n" ); document.write( "s = $\"4%2F.3\"$
\n" ); document.write( "w = 13 $\"1%2F3\"$ gal of pure water to be added
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check for amt of salt: .3(13.333 + 20) = 10 \n" ); document.write( "

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