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3 February, 03:09

7.8 + 2 (0.75m + 0.4) = - 6.4m + 4 (0.5m - 0.8)

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Answers (2)
  1. 3 February, 03:33
    0
    B

    Step-by-step explanation:

    She is incorrect because when substituting 2 for m the result was a false statement.
  2. 3 February, 06:29
    0
    m = 13.4/4.65

    Step by step:

    7.8 + 2 (0.75m + 0.4) = - 6.4m + 4 (0.5m - 0.8)

    7.8 + 2.75m + 0.8 = - 6.4m + 4.5m - 4.8

    2.75m + 6.4m - 4.5m = - 7.8 - 0.8 - 4.8

    4.65m = 13.4

    m = 13.4/4.65
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