Matematika

Pertanyaan

3) 3 (2x - 1) + 1 =2 (3x-1)
4) 5x + 4 =x -1
5) 4 - 8x = 7 - 5x

2 Jawaban

  • 3. (6x-3)+1= 6x-2
    6x-6x = -2+4
    x = 2
    4. 6x = -1-4
    x = 6/5
    5. -8x+5x = 7-4
    3x = 3
    x = 1
  • Bab : Persamaan Linear Satu Variabel ( PLSV )
    Kelas : VII SMP

    => 3(2x - 1 ) + 1 = 2(3x - 1)
    => 6x - 3 + 1 = 6x - 2
    => 6x - 6x = - 2 + 2
    => 0 = 0

    => 5x + 4 = x - 1
    => 5x - x = -1 - 4
    => 4x = -5
    => x = -5/4

    => 4 - 8x = 7 - 5x
    => -8x + 5x = 7 - 4
    => -3x =3
    => x = -1

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