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math

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1. 5x - 3y + 2x - y =

2. 5r(3s) + 6r - 2rs =

3. a93b) + b(-3a) =

  • math - ,

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

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