document.write( "Question 944404: a chemist has two alcohol-in-water: a 20% alcohol solution and a 50% alcohol solution. He needs 12 L of a solution that is 45% alcohol. How many liters of the two starting solutions should he mix \n" ); document.write( "
Algebra.Com's Answer #575859 by lwsshak3(11628)\"\" \"About 
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a chemist has two alcohol-in-water: a 20% alcohol solution and a 50% alcohol solution. He needs 12 L of a solution that is 45% alcohol. How many liters of the two starting solutions should he mix
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\n" ); document.write( "let x=amt of 20% solution to mix
\n" ); document.write( "12-x=amt of 50% solution to mix
\n" ); document.write( "20%x+50%(12-x)=45%*12
\n" ); document.write( ".20x+6-.50x=5.4
\n" ); document.write( ".30x=.60
\n" ); document.write( "x=2
\n" ); document.write( "12-x=10
\n" ); document.write( "amt of 20% solution to mix=2 liters
\n" ); document.write( "amt of 50% solution to mix=10 liters
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