document.write( "Question 823317: Please help me solve x from: log4(2x) - log4(x-1) = -1
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Algebra.Com's Answer #495409 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "log4(2x) - log4(x-1) = -1\r\n" );
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document.write( "Use the rule \"log%28B%2C%28A%29%29=log%28B%2C%28C%29%29=log%28B%2C%28A%2FC%29%29\"\r\n" );
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document.write( "log4\"%28%282x%29%2F%28x-1%29%29\" = -1\r\n" );
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document.write( "Use the rule for changing a logarithm equation to an equivalent\r\n" );
document.write( "exponential equation: \"log%28B%2C%28A%29%29=C\" is equivalent to \"A=B%5EC\":\r\n" );
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document.write( "\"%28%282x%29%2F%28x-1%29%29\" = 4-1\r\n" );
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document.write( "Use the rule for a negative exponent:\r\n" );
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document.write( "\"%28%282x%29%2F%28x-1%29%29\" = \"1%2F4\"\r\n" );
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document.write( "Cross multiply:\r\n" );
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document.write( "8x = x-1\r\n" );
document.write( "7x = -1\r\n" );
document.write( " x = \"%28-1%29%2F7\"\r\n" );
document.write( " x = \"-1%2F7\"\r\n" );
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document.write( "Edwin
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