document.write( "Question 39779: How many litres of 14% alcohol solution must be mixed with 20L of a 50% solution to get a 30% solution. \r
\n" ); document.write( "\n" ); document.write( "How do you set this problem up. I thought .14x+.5(x+20)=.3 but I am way off. \n" ); document.write( "
Algebra.Com's Answer #25206 by stanbon(75887)\"\" \"About 
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How many litres of 14% alcohol solution must be mixed with 20L of a 50% solution to get a 30% solution. \r
\n" ); document.write( "\n" ); document.write( "Let \"x\" be amount of 14% solution.
\n" ); document.write( "Then 0.14x liters of this is alcohol.
\n" ); document.write( "Also, 0.50(20L)= 10 liters is alcohol.
\n" ); document.write( "EQUATION:
\n" ); document.write( "alcohol + alcohol = 0.30(x+20)liters
\n" ); document.write( "0.14x + 10 = 0.30x + 6
\n" ); document.write( "Multiply through by 100 to get:
\n" ); document.write( "14x + 1000 = 30x + 600
\n" ); document.write( "-16x = -400
\n" ); document.write( "x= 25 liters (this is the amount of 14% solution you need to add)
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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