Matematika

Pertanyaan

x+y+z= 2
3x - y +2z = 4
x+y-z= 6

make cara linear

1 Jawaban

  • I. x + y + z = 2 ----> z = 2 - x - y
    II. 3x - y + 2z = 4
    III. x + y - z = 6

    I dan II
    3x - y + 2(2 - x - y) = 4
    3x - y + 4 - 2x - 2y = 4
    3x - 2x - y - 2y = 4 - 4
    x - 3y = 0 .........1) -----> x = 3y

    I dan III
    x + y - (2 - x - y) = 6
    x + x + y + y - 2 = 6
    2x + 2y = 6 + 2
    2x + 2y = 8
    x + y = 4 ........2)

    1 dan 2
    3y + y = 4
    4y = 4
    y = 1

    x = 3(1)
    x = 3

    z = 2 - x - y
    z = 2 - 3 - 1
    z = -2

    HP{3, 1, -2}

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