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18 July, 15:29

Is the equation 3+z=-19 true false or open

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Answers (2)
  1. 18 July, 16:30
    0
    It would be an open answer
  2. 18 July, 18:35
    0
    Subtract 3 from both sides to get

    3+z=-19

    3+z-3=-19-3

    z = - 22

    So it's true when z = - 22.
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