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how do you simplify mn - 7m + 5n - 9mn + 2n =

 Jun 6, 2017
 #1
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mn - 7m +5n - 9mn + 2n

 Group like terms

       = 1mn -9mn +5n + 2n -7m

       = -8mn +7n -7m

 Jun 6, 2017

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