document.write( "Question 1130364: Solve for x:\r
\n" ); document.write( "\n" ); document.write( "log5 x + log5(x-24) = 2\r
\n" ); document.write( "\n" ); document.write( "Please show me how you got the answer, thanks.
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Algebra.Com's Answer #747052 by greenestamps(13215)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "\"log%285%2Cx%29+%2B+log%285%2C%28x-24%29%29+=+2\"

\n" ); document.write( "You have two valid and correct solutions to your equation from other tutors; let me suggest a different method that I personally find easier.

\n" ); document.write( "My preferred first step, given two terms with log base 5 on the left and an integer on the right, is to rewrite the integer as a term in log base 5:

\n" ); document.write( "\"log%285%2Cx%29+%2B+log%285%2C%28x-24%29%29+=+log%285%2C25%29\"

\n" ); document.write( "Now, with all terms log base 5, I can convert this to an ordinary algebraic equation using basic rules of logarithms; then solve the equation:

\n" ); document.write( "\"x%28x-24%29+=+25\"
\n" ); document.write( "\"x%5E2-24x-25+=+0\"
\n" ); document.write( "\"%28x-25%29%28x%2B1%29+=+0\"
\n" ); document.write( "\"x+=+25\" or \"x+=+-1\"

\n" ); document.write( "However, the log of a negative number is not a real number, so the only solution is x = 25.
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