document.write( "Question 767063: Two vessels contain mixture of alcohol and water. In one there is three times as much as alcohol as water; in the other, five times as much water as alcohol. How much must be drawn off from each to fill a third vessel which holds 7 gallons, in order that its contents may be half alcohol and half water? \n" ); document.write( "
Algebra.Com's Answer #467384 by josmiceli(19441)\"\" \"About 
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Let \"+a+\" = gallons of mixture to be drawn off
\n" ); document.write( "from the 3:1 alcohol to water mixture
\n" ); document.write( "Let \"+b+\" = gallons of mixture to be drawn off
\n" ); document.write( "from the 1:5 alcohol to water mixture
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\n" ); document.write( "\"+3%2F4+\" of \"+a+\" will be alcohol
\n" ); document.write( "\"+1%2F6+\" of \"+b+\" will be alcohol
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\n" ); document.write( "(1) \"+a+%2B+b+=+7+\"
\n" ); document.write( "(2) \"+%28+%283%2F4%29%2Aa+%2B+%28+1%2F6%29%2Ab+%29+%2F+7+=+.5+\"
\n" ); document.write( "--------------------------------
\n" ); document.write( "(2) \"+%28+%283%2F4%29%2Aa+%2B+%28+1%2F6%29%2Ab+%29+=+3.5+\"
\n" ); document.write( "Multiply both sides by \"+12+\"
\n" ); document.write( "(2) \"+9a+%2B+2b+=+42+\"
\n" ); document.write( "Multiply both sides of (1) by \"+2+\" and
\n" ); document.write( "subtract (1) from (2)
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\n" ); document.write( "I have to run- solve for \"+a+%5D%5D%5D+and+%7B%7B%7B+b+\"
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