Matematika

Pertanyaan

selesaikan persamaan berikut ! a.5×-3 =17. b.8 - 3x =14. c.3x + 14 = 15x - 22 d.2 (4x -3) =5 (2x +7)

1 Jawaban

  • a. 5x - 3 = 17
    • 5x = 17 + 3
    • 5x = 20
    • x = 20/5
    • x = 4

    b. 8 - 3x = 14
    • -3x = 14 - 8
    • -3x = 6
    • x = 6/-3
    • x = -2

    c. 3x + 14 = 15x - 22
    • 3x - 15x = -22 -14
    • -12x = -36
    • x = -36/-12
    • x = 36/12
    • x = 3

    d. 2 (4x -3) = 5 (2x +7)
    • 2 + 4x -3 = 5 + 2x + 7
    • -1 + 4x = 12 + 2x
    • 4x - 2x = 12 + 1
    • 2x = 13
    • x = 13/2

    semoga bermanfaat ; )

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