document.write( "Question 954374: how many liters of pure sale must be added to 15 liters of a 40% salt solution to obtain a 60% salt solution? \n" ); document.write( "
Algebra.Com's Answer #583014 by ankor@dixie-net.com(22740)\"\" \"About 
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how many liters of pure salt must be added to 15 liters of a 40% salt solution to obtain a 60% salt solution?
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\n" ); document.write( "let s = amt of pure salt required
\n" ); document.write( "the resulting amt will be (s+15)
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\n" ); document.write( ".4(15) + s = .60(s + 15)
\n" ); document.write( "6 + s = .6s + 9
\n" ); document.write( "s - .6s = 9 - 6
\n" ); document.write( ".4s = 3
\n" ); document.write( "s = 3/.4
\n" ); document.write( "s = 7.5 liters of salt \n" ); document.write( "
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