document.write( "Question 1082442: A mixture of alchohol and water contains 15% alchohol. How many gallons of alchohol must be added to 5 gallons. of this mixture to make it a 20% mixture. \n" ); document.write( "

Algebra.Com's Answer #696493 by Fombitz(32388) $\"\"$ $\"About$

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In the 5 gallon mixture,
\n" ); document.write( " $\"5%2A%2815%2F100%29=75%2F100=3%2F4\"$
\n" ); document.write( "3/4 gallon is alcohol.
\n" ); document.write( "So to get it to 20%, add X.
\n" ); document.write( " $\"%283%2F4%2BX%29%2F%285%2BX%29=20%2F100\"$
\n" ); document.write( " $\"100%283%2F4%2BX%29=20%285%2BX%29\"$
\n" ); document.write( " $\"75%2B100X=100%2B20X\"$
\n" ); document.write( " $\"80X=25\"$
\n" ); document.write( " $\"X=25%2F80\"$
\n" ); document.write( " $\"X=5%2F16\"$ $\"gallons\"$ \n" ); document.write( "

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