Matematika

Pertanyaan

X + 2y = -4
2x + z = 5
Y - 3z = 5

1 Jawaban

  • X + 2Y = -4
    X = -2Y - 4

    2X + Z = 5
    2(-2Y - 4) + Z = 5
    -4Y - 8 + Z = 5
    -4Y + Z = 13

    -4Y + Z = 13 |x3|
    Y - 3Z = 5
    —————— +
    -11Y = 44
    Y = -4

    X + 2Y = -4
    X + 2(-4) = -4
    X = 4

    Y - 3Z = 5
    -4 - 3Z = 5
    -3Z = 9
    Z = -3

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