Matematika

Pertanyaan

jawabkan sekarang juga
jawabkan sekarang juga

1 Jawaban

  • 2x + y - 3z = - 5
    x - 3y + 2z = - 6
    3x + 2y - z = 1

    2x + y - 3z = - 5
    y = - 5 - 2x + 3z

    3x + 2y - z = 1
    3x + 2(- 5 - 2x + 3z) - z = 1
    3x - 10 - 4x + 6z - z = 1
    - x + 5z = 1 + 10
    - x + 5z = 11

    x - 3y + 2z = - 6
    x - 3(- 5 - 2x + 3z) + 2z = - 6
    x + 15 + 6x - 9z + 2z = - 6
    7x - 7z = - 6 - 15
    7x - 7z = - 21
    x - z = - 3

    - x + 5z = 11
    x - z = - 3
    _________+
    4z = 8
    z = 2

    x - z = - 3
    x - 2 = - 3
    x = - 3 + 2
    x = - 1

    y = - 5 - 2x + 3z
    y = - 5 + 2 + 6
    y = 3

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