document.write( "Question 547190: Moonshine has 50 liters of a 70% alcohol solution. How many liters of pure alcohol must be added to obtain an 80% alcohol solution? \n" ); document.write( "

Algebra.Com's Answer #356271 by mathie123(224) $\"\"$ $\"About$

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Let x be the number of litres of pure alcohol that is added. \r
\n" ); document.write( "\n" ); document.write( " $\"x%281.00%29%2B50%280.7%29=%28x%2B50%29%280.8%29\"$ \r
\n" ); document.write( "\n" ); document.write( "(Note: each term consists of the number of litres times the percentage of alcohol)\r
\n" ); document.write( "\n" ); document.write( " $\"x%2B35=0.8x%2B40\"$
\n" ); document.write( " $\"0.2x=5\"$
\n" ); document.write( " $\"x=25\"$ \r
\n" ); document.write( "\n" ); document.write( "Therefore, 25 litres of pure alcohol must be added. \n" ); document.write( "

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