document.write( "Question 378673: If I have four gallons of 50 degree farenheit water and I need to add one more gallon of water what does the temperature of the last gallon need to be if the whole mixture ends up at 70 degrees.\r
\n" ); document.write( "\n" ); document.write( "This is used to mix up home brewed beer where the ideal temperature is 70 to add the yeast. The last gallon actually has a sugar solution.\r
\n" ); document.write( "\n" ); document.write( "The entire specific gravity of the mix ends up at 1035 just in case that needs to be figured in.\r
\n" ); document.write( "\n" ); document.write( "My name is Gerard and I am not smarter than a fifth grader. \n" ); document.write( "
Algebra.Com's Answer #268961 by Alan3354(69443)\"\" \"About 
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If I have four gallons of 50 degree farenheit water and I need to add one more gallon of water what does the temperature of the last gallon need to be if the whole mixture ends up at 70 degrees.
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\n" ); document.write( "If you assume that mixing equal volumes of water gives the mix the average of the 2 temperatures, which seems likely, tho I haven't thought about this before:\r
\n" ); document.write( "\n" ); document.write( "Then you have to deal with units of \"degree-gallons\", something new to me.
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\n" ); document.write( "4 gals @ 50º = 200 deg-gallons
\n" ); document.write( "The mix desired is 5 gallons @ 70º = 350 deg-gallons
\n" ); document.write( "The gallon to be added has to have 150 deg-gallons of heat, so it has to be 150º
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