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posted by gary Saturday, July 14, 2012 at 10:25pm.

1. 5x - 3y + 2x - y = 2. 5r(3s) + 6r - 2rs = 3. a93b) + b(-3a) =

1. 7x - 4y 2. 13 rs -6r = r(13s - 6) 3, is the 9 supposed to be a ( ?

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