document.write( "Question 151346: 1.How many quarts of pure alcohol must be added to 10 quarts of a 15% alcohol solution to obtain a mixture which is 25% alcohol? All percentages are by volume \n" ); document.write( "

Algebra.Com's Answer #111254 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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1.How many quarts of pure alcohol must be added to 10 quarts of a 15% alcohol solution to obtain a mixture which is 25% alcohol? All percentages are by volume.
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\n" ); document.write( "Let x = amt of pure alcohol required
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\n" ); document.write( "Write amt of alcohol equation:
\n" ); document.write( ".15(10) + x = .25(x+10)
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\n" ); document.write( "1.5 + x = .25x + 2.5
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\n" ); document.write( "x - .25x = 2.5 - 1.5
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\n" ); document.write( ".75x = 1
\n" ); document.write( "x = $\"1%2F.75\"$
\n" ); document.write( "x = 1 $\"1%2F3\"$ qt of pure alcohol required
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\n" ); document.write( "Check solution on cal
\n" ); document.write( "1.5 + 1.33 = .25(2.83)
\n" ); document.write( "2.83 = 2.83 \n" ); document.write( "

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