Matematika

Pertanyaan

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1 Jawaban

  • 1) ½ x - 3 = 5
    ½ x = 5 + 3
    ½ x = 8
    x = 8 ÷ ½
    x = 8 × 2/1
    x = 16

    2) 2x - 5 < 11
    2x < 11 + 5
    2x < 16
    x < 8

    3) 3(2x + ⅓) = 4 (3x - ½)
    6x + 1 = 12x - 2
    6x - 12x = - 2 - 1
    - 6x = - 3
    x = -3/-6
    x = 3/6
    x = ½

    4) ½ ( 2p - 6) >_ ⅔ ( p + 4)
    p - 3 >_ ⅔p + 8/3
    p - ⅔p >_ 8/3 + 3
    ⅓p >_ 17/3
    p >_ 17/3 ÷ ⅓
    p >_ 17/3 × 3/1
    p>_ 17

    5) 4x - 5 = 12
    4x = 12 + 5
    x = 17/4