document.write( "Question 948808: Use logarithms to solve the given equation. (Round the answer to four decimal places.)\r
\n" ); document.write( "\n" ); document.write( "7(1.09^4x + 1) = 15\r
\n" ); document.write( "\n" ); document.write( "x= \n" ); document.write( "

Algebra.Com's Answer #579119 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"7%2A1.09%5E%284x+%2B+1%29+=+15\"$
\n" ); document.write( " $\"1.09%5E%284x+%2B+1%29+=+15%2F7\"$
\n" ); document.write( " $\"4x%2B1=log%281.09%2C%2815%2F7%29%29\"$
\n" ); document.write( " $\"4x=-1%2Blog%281.09%2C%2815%2F7%29%29\"$
\n" ); document.write( " $\"x=-1%2F4%2B%281%2F4%29%2Alog%281.09%2C%2815%2F7%29%29\"$
\n" ); document.write( " $\"x=-1%2F4%2B%281%2F4%29%2A%28log%28%2815%2F7%29%29%2Flog%28%281.09%29%29%29\"$
\n" ); document.write( " $\"x=1.960955\"$
\n" ); document.write( "To 4 decimal places, x=1.9610 \n" ); document.write( "

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