document.write( "Question 1058775: I am looking for how I get the answer for:
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document.write( "ln(5x) = 3 + ln(x-1)\r
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document.write( "I move the natural logs to one side to make ln(5x) - ln(x-1) = 3, then use the properties of logarithms to get ln(5x/(x-1)) = 3. \r
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document.write( "I then make both sides a power of e to cancel out the ln and end up with 5x/(x-1) = e^3\r
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document.write( "I then multiply both sides by (x-1) to remove the fraction and get 5x = (e^3)x - e^3\r
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document.write( "Here is where I am stuck. I am unsure how to isolate the x. I know what the answer is supposed to be as this is a practice problem, but I don't know how to get there from here! And maybe I made a mistake in the process. Any help is greatly appreciated! Thank you! \n" );
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Algebra.Com's Answer #673868 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! ln(5x/(x-1)) = 3 \n" ); document.write( ": \n" ); document.write( "use definition of logarithm \n" ); document.write( ": \n" ); document.write( "5x/(x-1) = e^3 \n" ); document.write( ": \n" ); document.write( "note that e = 2.71828 \n" ); document.write( ": \n" ); document.write( "5x / (x-1) = (2.71828)^3 = 20.0855 \n" ); document.write( ": \n" ); document.write( "5x = 20.0855 * (x-1) \n" ); document.write( ": \n" ); document.write( "5x = 20.0855x - 20.0855 \n" ); document.write( ": \n" ); document.write( "15.0855x = 20.0855 \n" ); document.write( ": \n" ); document.write( "********** \n" ); document.write( "x = 1.3314 \n" ); document.write( "********** \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( " |