Posted by Serena on Monday, April 2, 2012 at 11:58am.
1 / a - 1 / b = c
1 / a = c - 1 / b
1 / a = c b / b - 1 / b
1 / a = ( c b - 1 ) / b
Reciprocal :
a = b / ( c b - 1 )
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