Matematika

Pertanyaan

Diketahui SPLTV :
3x-y+2z=15 ........1
2x+y+z=13 .........2
3x+2y+2z=24 ....3

Tolong diselesaikan dengan metode eliminasi ya???

1 Jawaban

  • 3x - y + 2z = 15
    2x + y + z = 13
    3x + 2y + 2z = 24

    3x - y + 2z = 15
    3x + 2y + 2z = 24
    _____________—
    - 3y = - 9
    y = 3

    3x - y + 2z = 15|× 2
    3x + 2y + 2z = 24|× 1

    6x - 2y + 4z = 30
    3x + 2y + 2z = 24
    _____________+
    9x + 6z = 54

    3x - y + 2z = 15
    2x + y + z = 13
    ___________+
    5x + 3z = 28

    9x + 6z = 54|× 1
    5x + 3z = 28|× 2

    9x + 6z = 54
    10x + 6z = 56
    __________—
    - x = - 2
    x = 2

    9x + 6z = 54|× 5
    5x + 3z = 28|× 9

    45x + 30z = 270
    45x + 27z = 252
    ____________—
    3z = 18
    z = 6

    Maaf Kalau Salah

Pertanyaan Lainnya