Matematika

Pertanyaan

1. | x + 8 | = 16
2. | 2 x + 5 | = 8
3. | 3 x - 3 | = 12

1 Jawaban

  • 1. | x + 8 | = 16
    x + 8 = 16
    x = 16 - 8
    x = 8
    atau
    - | x + 8 | = 16
    x + 8 = -16
    x = -16 -8
    x = -24

    2. |2x + 5| = 8
    2x + 5 = 8
    2x = 8 -5
    2x = 3
    x = 3/2
    atau
    -|2x + 5| = 8
    2x + 5 = -8
    2x = -8 -5
    2x = -13
    × = -13/2

    3. |3x -3 | = 12
    3x -3 = 12
    3x = 12 + 3
    3x = 15
    x = 5
    atau
    -|3x-3| = 12
    3x - 3 = -12
    3x = -12 + 3
    3x = -9
    x = -3

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