document.write( "Question 1203419: 12 ml of a 65% alcohol solution was mixed with 8 ml of an 80% alcohol solution. What is the concentration of the mixture?\r
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Algebra.Com's Answer #838960 by Edwin McCravy(20055)\"\" \"About 
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12 ml of a 65% alcohol solution was mixed with 8 ml of an 80% alcohol solution.
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document.write( "The concentration is the percentage of alcohol in the final solution; let\r\n" );
document.write( "that be x:\r\n" );
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document.write( "                ml of solution| % expressed as a decimal| ml of pure alcohol\r\n" );
document.write( "1st solution          12      |           0.65          |   12(0.65) = 7.8\r\n" );
document.write( "2nd solution           8      |           0.80          |    8(0.80) = 6.4\r\n" );
document.write( "final solution        20      |             x           |             14.2\r\n" );
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document.write( "20x = 14.2\r\n" );
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document.write( "  x = 0.71 = 71%   <--answer\r\n" );
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document.write( "Edwin
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