Matematika

Pertanyaan

5×-2y=11
3×+2y=13
Tentukan x-2y=.....

1 Jawaban

  • 5x - 2y = 11 --------------> 8x = 24
    3x + 2y = 13 x = 24/8
    x = 3

    3x + 2y = 13
    3(3) + 2y = 13
    9 + 2y = 13
    2y = 13 - 9
    2y = 4
    y = 4/2
    y = 2

    x - 2y = 3 - 2 (2)
    = 3 - 4
    = -1

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