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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Tìm x : `a) x+2/7=3/14` `c) (-3)/11 – x= (-5)/22` `b)x – 4/15 = 3/10` `d) 7/20 – (2/5 + x) = 1/6`

Tháng Hai 16, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: Tìm x :
a) x+2/7=3/14
c) (-3)/11 – x= (-5)/22
b)x – 4/15 = 3/10
d) 7/20 – (2/5 + x) = 1/6

Comments ( 2 )

  1. baoquyen
    baoquyen
    16 Tháng Hai, 2023 at 2:22 sáng
    Reply
    Giải đáp:
    $\\$
    a,
    x + 2/7 =3/14
    ↔ x = 3/14 – 2/7
    ↔ x = 3/14 – 4/14
    ↔ x  = (-1)/14
    Vậy x=(-1)/14
    $\\$
    b,
    x – 4/15 = 3/10
    ↔ x =3/10 + 4/15
    ↔x = 9/30 + 8/30
    ↔ x = 17/30
    Vậy x=17/30
    $\\$
    c,
    (-3)/11 – x = (-5)/22
    ↔ x = (-3)/11 – (-5)/22
    ↔ x  = (-3)/11 + 5/22
    ↔x = (-6)/22 +5/22
    ↔x=(-1)/22
    Vậy x=(-1)/22
    $\\$
    d,
    7/20 – (2/5 + x) = 1/6
    ↔ 2/5 + x = 7/20 – 1/6
    ↔ 2/5 + x = 42/120 – 20/120
    ↔ 2/5 + x = 11/60
    ↔x = 11/60 – 2/5
    ↔x=11/60 – 24/60
    ↔x=(-13)/60
    Vậy x=(-13)/60
     

  2. tuyen98
    tuyen98
    16 Tháng Hai, 2023 at 2:22 sáng
    Reply
    a) x + 2/7 = 3/14
    x = 3/14 – 2/7
    x = 3/14 – 4/14
    x = -1/14
    Vậy x = -1/14
    c) -3/11 – x = -5/22
    x = -3/11 – -5/22
    x = -6/22 + 5/22
    x = -1/22
    Vậy x = -1/22
    b) x – 4/15 = 3/10
    x = 3/10 + 4/15
    x = 9/30 + 8/30
    x = 17/30
    Vậy x = 17/30
    d) 7/20 – (2/5 + x) = 1/6
    2/5 + x = 7/20 – 1/6
    2/5 + x = 42/120 – 20/120
    2/5 + x = 22/120
    2/5 + x = 11/60
    x = 11/60 – 2/5
    x = 11/60 – 24/60
    x = -13/60
    Vậy x = -13/60

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222-9+11+12:2*14+14 = ? ( )

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