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28 March, 23:30

3-2 (m+4) = 15 how do I do this

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Answers (2)
  1. 28 March, 23:58
    0
    3 - 2 (m + 4) = 15

    3 - 2 (m) - 2 (4) = 15

    3 - 2m - 8 = 15

    3 - 8 - 2m = 15

    -5 - 2m = 15

    + 5 + 5

    -2m = 20

    -2 - 2

    m = - 10
  2. 28 March, 23:59
    0
    Multipy - 2 (m+4) first

    Then you have

    3-2m-8=15

    Subtact 3 and 8 from each side

    -2m=4

    Divide by - 2 on both sides

    m=-2

    Then plug in - 2 for m to check
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