document.write( "Question 1010711: I am stuck on this problem. If I can see this worked out it would help a lot!\r
\n" ); document.write( "\n" ); document.write( "If f(x) = (1/x - 9x) / (1+3x), what is f(1/x).\r
\n" ); document.write( "\n" ); document.write( "My book says the answer is x-3 but I cannot get this same answer. \n" ); document.write( "
Algebra.Com's Answer #626191 by MathTherapy(10556)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "I am stuck on this problem. If I can see this worked out it would help a lot!\r
\n" ); document.write( "\n" ); document.write( "If f(x) = (1/x - 9x) / (1+3x), what is f(1/x).\r
\n" ); document.write( "\n" ); document.write( "My book says the answer is x-3 but I cannot get this same answer.
\n" ); document.write( "
\"f%28x%29+=+%281%2Fx+-+9x%29%2F%281+%2B+3x%29\"
\n" );
document.write( "\"f%281%2Fx%29+=+%281%2F%281%2Fx%29+-+9%281%2Fx%29%29%29\"\"%22%F7%22\"\"%281+%2B+3%281%2Fx%29%29\"
\n" );
document.write( "\"f%281%2Fx%29+=+%281+%2A+%28x%2F1%29+-+9%2Fx%29%29\"\"%22%F7%22\"\"%281+%2B+3%2Fx%29\"
\n" );
document.write( "\"f%281%2Fx%29+=+%28x+-+9%2Fx%29%29\"\"%22%F7%22\"\"%281+%2B+3%2Fx%29\"
\n" );
document.write( "\"f%281%2Fx%29+=+%28%28x%5E2+-+9%29%2Fx%29\"\"%22%F7%22\"\"%28%28x+%2B+3%29%2Fx%29\"
\n" );
document.write( "\"f%281%2Fx%29+=+%28%28x+-+3%29%28x+%2B+3%29%2Fx%29\"\"%22%F7%22\"\"%28%28x+%2B+3%29%2Fx%29\" ------ Factoring \"x%5E2+-+9\"
\n" );
document.write( "\"f%281%2Fx%29+=+%28%28x+-+3%29%28x+%2B+3%29%2Fx%29\"\"%22%2A%22\"\"%28x%2F%28x+%2B+3%29%29\" ------ Applying KEEP, CHANGE, FLIP
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document.write( "\"f%281%2Fx%29+=+%28highlight%28%28x+-+3%29%29cross%28%28x+%2B+3%29%29%2Fcross%28x%29%29\"\"%22%2A%22\"\"%28cross%28x%29%2Fcross%28%28x+%2B+3%29%29%29\"
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document.write( "\"highlight_green%28f%281%2Fx%29+=+x+-+3%29\" \n" );
document.write( "
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