document.write( "Question 1112415: for the equation y=7 times 10 to the power of 4-x, use base 10 logs to rearrange this equation to make x the subject\r
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Algebra.Com's Answer #727438 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
\"y=7%2A10%5E%284-x%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%28%28y%29%29=log%28%287%2A10%5E%284-x%29%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%28%28y%29%29=log%28%287%29%29%2B%284-x%29%2Alog%28%2810%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Since in base 10,
\n" ); document.write( "\"log%28%28y%29%29-log%28%287%29%29=%284-x%29%2A1\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%28%28y%29%29-log%28%287%29%29=-x%2B4\"\r
\n" ); document.write( "\n" ); document.write( "\"log%28%28y%29%29-log%28%287%29%29-4=-x\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28x=log%28%287%29%29-log%28%28y%29%29%2B4%29\"
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\n" ); document.write( "\"highlight%28x=log%28%287%2Fy%29%29%2B4%29\"
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