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January 27, 2015

January 27, 2015

Posted by **Kim** on Thursday, April 18, 2013 at 11:39am.

- Math -
**Bosnian**, Thursday, April 18, 2013 at 12:31pm7 / a Multiply Numerator and Denominator by b

7 / a = 7 b / a b

9 / b Multiply Numerator and Denominator by a

9 / b = 9 a / a b

7 / a - 9 / b = 7 b / a b - 9 a / a b =

( 7 b - 9 a ) / a b

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