document.write( "Question 460253: How much water must be evaporated from 20 gallons of a 10% salt solution in order to obtain a 20% salt solution? \n" ); document.write( "
Algebra.Com's Answer #315707 by checkley79(3341)\"\" \"About 
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.10*20=2 gallons of salt.
\n" ); document.write( "That leaves 18 gallons of water.
\n" ); document.write( ".2x=2
\n" ); document.write( "x=2/.2
\n" ); document.write( "x=10 gallons after evaporation.
\n" ); document.write( "18-10=8 gallons have to be evaporated to have a 20% salt solution.
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