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29 June, 14:55

4 (2m-n) - 3 (2m-n) m=-15 and n = - 18

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Answers (2)
  1. 29 June, 15:18
    0
    Remember

    ab-ac=a (b-c)

    we can undistribute the (2m-n) to make it easier

    4 (2m-n) - 3 (2m-n) = (2m-n) (4-3) = (2m-n) (1) = (2m-n)

    2m-n

    for m=-15 and n=-18

    2 (-15) - (-18)

    -30+18

    -12
  2. 29 June, 15:23
    0
    The answer is - 12 ...
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