document.write( "Question 261151: 1st question: A chemist needs a saline solution that is 20% sodium chloride but only has solutions that are 15% and 40% solution should she add to make a 20% solution?
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Algebra.Com's Answer #192384 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( ".15x+.40y=.20(x+y)
\n" ); document.write( "Did you leave out some info? such as how much we have at the end or how much we start with?
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\n" ); document.write( "add 4 parts 15% solution to one part 40%
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