document.write( "Question 604691: Solve the logarithm equation log[4](x)+ log[4](6x-7)=log[4]5.
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document.write( "Give the exact answer in the form of a fraction.
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document.write( "x=____\r
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document.write( "I worked the problem and came up with two different fractions; I have x= 1/2 or x=5/3.\r
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Algebra.Com's Answer #381343 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! log[4](x)+ log[4](6x-7)=log[4]5 \n" ); document.write( "log[4](x)(6x-7)=log[4]5 \n" ); document.write( "(x)(6x-7)=5 \n" ); document.write( "6x^2 - 7x = 5 \n" ); document.write( "6x^2 - 7x - 5 = 0 \n" ); document.write( "6x^2 - 10x + 3x - 5 = 0 \n" ); document.write( "(6x^2 - 10x) + (3x - 5) = 0 \n" ); document.write( "2x(3x - 5) + (3x - 5) = 0 \n" ); document.write( "(3x - 5)(2x+1) = 0 \n" ); document.write( "x = {5/3, -1/2} \n" ); document.write( "Since you can't take the log of a negative number, you can throw out -1/2 (extraneous) leaving: \n" ); document.write( "x = 5/3 \n" ); document.write( " |