document.write( "Question 149962: x
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Algebra.Com's Answer #110072 by jim_thompson5910(35256)\"\" \"About 
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\"3%282%5Ex%29=42\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex=14\" Divide both sides by 3.\r
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\n" ); document.write( "\n" ); document.write( "\"log%2810%2C%282%5Ex%29%29=log%2810%2C%2814%29%29\" Take the log of both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"x%2Alog%2810%2C%282%29%29=log%2810%2C%2814%29%29\" Rewrite the left side using the identity \"log%28b%2C%28x%5Ey%29%29=y%2Alog%28b%2C%28x%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x=log%2810%2C%2814%29%29%2Flog%2810%2C%282%29%29\" Divide both sides by \"log%2810%2C%282%29%29\".\r
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\n" ); document.write( "\n" ); document.write( "\"x=log%282%2C%2814%29%29\" Use the change of base formula to rewrite the right side.\r
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\n" ); document.write( "\n" ); document.write( "So the answer is \"x=log%282%2C%2814%29%29\" which approximates to \"x=3.81\"
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