Matematika

Pertanyaan

1 .7n + 4 = 4n - 17 =
2.8n + 12 = 10n + 8 =
3.10 - 4n = 15 - 3n=

2 Jawaban

  • 1. 7n + 4 = 4n - 17
    7n - 4n = - 4 - 17
    3n = - 21
    n = - 21/3
    n = 7

    2. 8n + 12= 10n + 8
    8n - 10n= -12 + 8
    2n = -4
    n = -4/2
    n = -2

    3. 10 - 4n = 15 - 3n
    -4n + 3n= -10 + 15
    -n = -5
    n = 5

    Maaf kalau salah
  • 1)
    7n + 4 = 4n - 17
    7n - 4n = -17 - 4
    3n = -21
    n = -21/3
    n = -7

    2)
    8n + 12 = 10n + 8
    8n - 10n = 8 - 12
    -2n = -4
    n = -4/-2
    n = 2

    3)
    10 - 4n = 15 - 3n
    -4n + 3n = 15 - 10
    n = -5

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