Matematika

Pertanyaan

9x - (x - 11) = 5 - (x-3)
-2 + 3a = 7 - (8 + 3a)
3 (m-5) - 9 = 6 - 7m

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2 Jawaban

  • 9x - (x - 11) = 5 - (x - 3)
    9x - x + 11 = 5 - x + 3
    8x + 11 = 8 - x
    8x + x = 8 - 11
    9x = -3
    x = -3/9
    x = -⅓

    -2 + 3a = 7 - (8 + 3a)
    -2 + 3a = 7 - 8 - 3a
    3a + 3a = 7 - 8 + 2
    6a = 1
    a = 1/6

    3(m - 5) - 9 = 6 - 7m
    3m - 15 - 9 = 6 - 7m
    3m - 24 = 6 - 7m
    3m + 7m = 6 + 24
    10m = 30
    m = 30/10
    m = 3
  • 9x - (x - 11) = 5 - (x-3)
    9x - x + 11 = 5 - x + 3
    8x + 11 = 8 - x
    8x + x = 8 - 11
    9x = -3
    x = -3/9 = -1/3

    -2 + 3a = 7 - (8 + 3a)
    -2 + 3a = 7 - 8 - 3a
    -2 + 3a = -1 -3a
    3a + 3a = -1 + 2
    6a = 1
    a= 1/6

    3 (m-5) - 9 = 6 - 7m
    3m-15 - 9 = 6 - 7m
    3m-24= 6 - 7m
    3m + 7m = 6 + 24
    10m = 30
    m= 30/10 = 3

    semoga membantu#

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