document.write( "Question 476214: Solve for x.\r
\n" ); document.write( "\n" ); document.write( " $\"+e%5E%282x%29+-+3e%5Ex+-+40+=+0+\"$ \n" ); document.write( "

Algebra.Com's Answer #326558 by Tatiana_Stebko(1539) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+e%5E%282x%29+-+3e%5Ex+-+40+=+0+\"$
\n" ); document.write( "Let $\"t=e%5Ex\"$ $\"t%3E0\"$
\n" ); document.write( " $\"t%5E2-3t-40=0\"$
\n" ); document.write( " $\"%28t-8%29%28t%2B5%29=0\"$
\n" ); document.write( " $\"t-8=0\"$ or $\"t%2B5=0\"$
\n" ); document.write( " $\"t=8\"$ or $\"t=-5%3C0\"$ exteraneous root
\n" ); document.write( " $\"e%5Ex=8\"$
\n" ); document.write( " $\"x=ln8\"$ \n" ); document.write( "

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