document.write( "Question 564179: Rearrange 1/u + 1/v = 1/f\r
\n" ); document.write( "\n" ); document.write( "to make u the subject of the formula.
\n" ); document.write( "Give your answer in its simplest form. \r
\n" ); document.write( "\n" ); document.write( "I know that uv is the common denominator, but i dont know how to rearrange.
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Algebra.Com's Answer #365275 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
\"1%2Fu+%2B+1%2Fv+=+1%2Ff\"\r
\n" ); document.write( "\n" ); document.write( "\"1%2Fu+=+1%2Ff-+1%2Fv+\"\r
\n" ); document.write( "\n" ); document.write( "\"1%2Fu=+%28v-f%29%2Ffv\"\r
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\n" ); document.write( "\n" ); document.write( "\"u=+%28fv%29%2F%28v-f%29\"\r
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