document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=511931>Question 511931</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many liters of a mixture containing 70% alcohol should be added to a mixture containing 20% alcohol to obtain 16 liters of a mixture containing 50% alcohol? </SPAN>\n" );
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document.write( "Let x = amount (liters) of 70% alcohol<BR>\n" );
document.write( "then<BR>\n" );
document.write( "16-x = amount (liters) of 20% alcohol<BR>\n" );
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document.write( ".70x + .20(16-x) = .50(16)<BR>\n" );
document.write( ".70x + 3.2-.20x = 8<BR>\n" );
document.write( ".50x + 3.2 = 8<BR>\n" );
document.write( ".50x = 4.8<BR>\n" );
document.write( "x = 9.6 liters (70% alcohol)<BR>\n" );
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document.write( "20% alcohol:<BR>\n" );
document.write( "16-x = 16-9.6 = 6.4 liters\r<BR>\n" );
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document.write( " </SPAN>\n" );
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