document.write( "Question 615686: solve log(x+20)-log(x+2)=logx \n" ); document.write( "
Algebra.Com's Answer #387276 by MathTherapy(10552)\"\" \"About 
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solve log(x+20)-log(x+2)=logx\r
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\n" ); document.write( "\n" ); document.write( "log (x + 20) - log (x + 2) = log x\r
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\n" ); document.write( "\n" ); document.write( "log \"%28%28x+%2B+20%29%2F%28x+%2B+2%29%29\" = log \"%28x%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28x+%2B+20%29%2F%28x+%2B+2%29+=+x\"\r
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\n" ); document.write( "\n" ); document.write( "x(x + 2) = x + 20 ----- Cross-multiplying\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2+%2B+2x+=+x+%2B+20\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2+%2B+2x+-+x+-+20+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2+%2B+x+-+20+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "(x + 5)(x - 4) = 0\r
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\n" ); document.write( "\n" ); document.write( "x + 5 = 0 or x - 4 = 0\r
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\n" ); document.write( "\n" ); document.write( "x = - 5 (EXTRANEOUS) or x = \"highlight_green%284%29\"\r
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\n" ); document.write( "log (x + 20) - log (x + 2) = log x\r
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\n" ); document.write( "\n" ); document.write( "log (4 + 20) - log (4 + 2) = log 4 ------ Substituting 4 for x in original equation\r
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\n" ); document.write( "\n" ); document.write( "log (24) - log (6) = log 4\r
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\n" ); document.write( "\n" ); document.write( "log \"%2824%29%2F6\" = log \"4\"\r
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\n" ); document.write( "\n" ); document.write( "log (4) = log 4 (TRUE)\r
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\n" ); document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com
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