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sums and differences of rational algebraic expression please answer the following 9ab/cd^2 - 7ab/cd^2 another 3/x-1 - 2/x-1 another is 4x/4x-y - 2x/4x-y another is 3x/2y - 3x-2y/3x+2y another is 8/3x - 3/4x + 4/12x another is x-3/3x+1 + x+5/3x+1

asked by jazmin
  1. Take advantage of, or create, common denominators and add the numerators. These are the same kind of problems that Reiny has already answered for you.

    posted by drwls
  2. 2/24 1/4

    posted by Abby

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