document.write( "Question 482670: solve for x
\n" ); document.write( "12^(-7x)=7^(-x+8)
\n" ); document.write( "give the exact answer using base 10 logarithms
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Algebra.Com's Answer #330379 by stanbon(75887)\"\" \"About 
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solve for x
\n" ); document.write( "12^(-7x)=7^(-x+8)
\n" ); document.write( "give the exact answer using base 10 logarithms
\n" ); document.write( "------------
\n" ); document.write( "-7x*log(12) = (-x+8)*log7
\n" ); document.write( "----
\n" ); document.write( "-7*log(12) = -x*log(7) + 8*log(7)
\n" ); document.write( "(-7log(12)+log(7)]x = 8*log(7)
\n" ); document.write( "----
\n" ); document.write( "x = -0.1260
\n" ); document.write( "================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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