Matematika

Pertanyaan

menyelesaikan SPLDV 2x-3y=15 -3x+4y=-19

1 Jawaban

  • jawab

    2x -  3y= 15.......kali 3
    - 3x + 4y = -19...kali 2

    6x - 9y = 45
    -6x + 8y = - 38.....(+)
    -y =  7
    y= 7

    2x - 3y = 15
    2x - 21 = 15
    2x = 36
    x  = 18

    (x,y) = (18. 7)

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