document.write( "Question 517006: Twelve is the geometric mean of 9 and what number?
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Algebra.Com's Answer #344594 by JBarnum(2146) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"12=%289%2Bx%29%2F2\"$ multiply both sides by $\"2\"$
\n" ); document.write( " $\"24=9%2Bx\"$ subtract $\"9\"$ from both sides
\n" ); document.write( " $\"15=x\"$
\n" ); document.write( " $\"9\"$ and $\"highlight%2815%29\"$ has mean of $\"12\"$ \n" ); document.write( "

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