document.write( "Question 252487: how much pure acid is in 800 gallons of a 38% acid soloution \n" ); document.write( "
Algebra.Com's Answer #184431 by drk(1908)\"\" \"About 
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how much pure acid is in 800 gallons of a 38% acid solution. We are obviously looking at a mixture problem.\r
\n" ); document.write( "\n" ); document.write( "Pure acid = 100%.\r
\n" ); document.write( "\n" ); document.write( "PURE . . . 100 . . . X . . . . . 100X
\n" ); document.write( "(B?) . . . ?? . . .. 800-X . . . 800? - x?
\n" ); document.write( "MIX . . . 38 . . . . 800 . . . . 30400\r
\n" ); document.write( "\n" ); document.write( "100X - ?X + 800? = 30400.
\n" ); document.write( "X = (30400 - 800?) / (100-?)
\n" ); document.write( "What we have here is a Diophantine equation. We are thinking what values of ? make X a nice integer?
\n" ); document.write( "If ? = 0, X = 304.
\n" ); document.write( "If ? = 20, X = 180.
\n" ); document.write( "If ? = 36, X = 25 .\r
\n" ); document.write( "\n" ); document.write( "Not sure which way you want to go on this.
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