document.write( "Question 463955: How many gallons of 40 percent alcohol solution must be mixed with 70 percent solution to obtain 30 gallons of a 52 percent alcohol solution? \n" ); document.write( "
Algebra.Com's Answer #317835 by Alan3354(69443)\"\" \"About 
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How many gallons of 40 percent alcohol solution must be mixed with 70 percent solution to obtain 30 gallons of a 52 percent alcohol solution?
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\n" ); document.write( "All these solution problems go like this:
\n" ); document.write( "f = 40%, s = 70%
\n" ); document.write( "f + s = 30 (total solution)
\n" ); document.write( "0.4f + 0.7s = 0.52*30 (total alcohol)
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