Matematika

Pertanyaan

Bantulah saya mengerjakan tugas rumah ! (dengan segera) (lengkap dengan caranya)
Bantulah saya mengerjakan tugas rumah ! (dengan segera) (lengkap dengan caranya)

1 Jawaban

  • 1a) k + 7 = 12
    k = 12 - 7 = 5
    k + 11 = 16
    k = 16 - 11 = 5
    c) - 5 + y = 14
    y = 14 + 5 = 19
    y = 19
    d) 4 + m = 11
    m = 11 - 4 = 7
    - 2 + m = 5
    m = 5 + 2 = 7
    h) 3r = 2r + 5
    3r - 2r = 5
    r = 5
    5r = 5
    r = 1

    2a) x + 5 = 8
    x = 8 - 5 = 3
    b) y - 9 = 3
    y = 3 + 9 = 12
    c) 9 + z = 4
    z = 4 - 9 = - 5
    d) 2p + 4 = 14
    2p = 14 - 4
    2p = 10
    p = 5
    e) 9a - 5 = 8a + 6
    9a - 8a = 6 + 5
    a = 11
    f) b - 17 = 4b - 5
    b - 4b = 17 - 5
    - 3b = 12
    b = - 4
    g) 2c = c + 3
    2c - c = 3
    c = 3
    h) 7 + d = 2d - 1
    d - 2d = - 1 - 7
    - d = - 8
    d = 8

    3b) b = 5
    4b = 20
    b = 5
    c) - ¼c = 7
    c = 7 × (-4)
    c = - 28
    c = - 28
    d) 7d = 28
    d = 4
    d = 4
    f) 7x = 28
    x = 4
    x = 4
    g) 3/5 z = 6
    z = 6 × 5 ÷ 3
    z = 10
    z = 10
    h) 1/5 q = 6
    q = 6 × 5
    q = 30
    q = 30

    4a) 2k = 8
    k = 4
    b) 3n = 9
    n = 3
    c) ⅓ m = 4
    m = 12
    d) 3/5 p = 7
    p = 35/3
    e) 9x = 3
    x = 3/9 = ⅓
    f) 16 = 4y
    y = 4
    g) 9 = 3/5 z
    z = 45/3
    h) 7 = 2d
    d = 7/2