document.write( "Question 246553: can this be done with one variable
\n" ); document.write( "how many gallons each of 25% alcohol and 35% alcohol should be mixed to obtain 20 gallons of 32% alcohol \r
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Algebra.Com's Answer #180003 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
I don't see how since we are talking about two different mixtures of alcohol.
\n" ); document.write( "25% alcohol is x gallons and 35% alcohol is y gallons
\n" ); document.write( "x+y=20
\n" ); document.write( "x=20-y
\n" ); document.write( "y=20-x\r
\n" ); document.write( "\n" ); document.write( ".25x+.35*y=.32*20
\n" ); document.write( "We have two variables and two equations.
\n" ); document.write( "Substitute EITHER x (x=20-y) or y (y=20-x) in the mixture formula.\r
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