Matematika

Pertanyaan

subtitusikan : 2x-3y=13 & 4x+y=15

1 Jawaban

  • 2x - 3y = 13
    2x = 3y + 13

    4x + y = 15
    2(3y + 13) + y = 15
    6y + 26 + y = 15
    7y = 15 - 26
    y = - 11/7

    2x - 3y = 13
    2x - 3(-11/7) = 13
    2x = 13 + 33/7
    2x = 91/7 + 33/7
    x = 124/7 รท 2
    x = 124/ 14
    x = 62/7

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