document.write( "Question 426625: How many kilograms of salt must be added to 24 kg of a 20% salt solution in order to increase the concentration of salt to 40%?
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Algebra.Com's Answer #296754 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Let x represent the amount of pure salt(100%) added...
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document.write( "  Mixing to form (24kg+x)of 40% solution
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document.write( "   .20*24kg + x = .40(24kg+x)
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document.write( "           .60x = .20*24kg
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document.write( "              x = .20*24kg/.60
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document.write( "              x = 8kg, the amount of pure salt that needs to be added\r
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document.write( "CHECKING our Answer***
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document.write( "   4.8kg + 8kg = 12.8kg = .4*32kg = 12.8kg \n" );
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