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

Toán Lớp 6: a,8/15x + 5/7=-2/21 b,2/3.(3x-2) + 25%.x = -9/6 c,3,2x-(4/5+2/3):11/3=7/20 d,(3/5x-2/3x-x).1/7=-5/21 lam ho nhe

Home/ Toán Lớp 6: a,8/15x + 5/7=-2/21 b,2/3.(3x-2) + 25%.x = -9/6 c,3,2x-(4/5+2/3):11/3=7/20 d,(3/5x-2/3x-x).1/7=-5/21 lam ho nhe

Toán Lớp 6: a,8/15x + 5/7=-2/21 b,2/3.(3x-2) + 25%.x = -9/6 c,3,2x-(4/5+2/3):11/3=7/20 d,(3/5x-2/3x-x).1/7=-5/21 lam ho nhe

Tháng Mười Hai 23, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a,8/15x + 5/7=-2/21
b,2/3.(3x-2) + 25%.x = -9/6
c,3,2x-(4/5+2/3):11/3=7/20
d,(3/5x-2/3x-x).1/7=-5/21
lam ho nhe

Comments ( 2 )

  1. truongankimtrong
    truongankimtrong
    23 Tháng Mười Hai, 2022 at 5:57 chiều
    Reply
    a)
    8/15x + 5/7 = -2/21
    => 8/15x = -2/21 – 5/7
    => 8/15x =-17/21
    => x=  -17/21 : 8/15
    => x = -85/56
    Vậy x=-85/56
    b)
    2/3 . (3x-2) + 25% . x = -9/6
    =>  2x – 4/3 + 1/4 x = -9/6
    => 2x + 1/4x = -9/6 + 4/3
    => 9/4x = -1/6
    => x=  -1/6 : 9/4
    =>x = -2/27
    Vậy x=-2/27
    c)
    3,2x – (4/5 + 2/3) : 11/3 = 7/20
    => 3,2x  – 22/15 : 11/3 = 7/20
    => 3,2x – 2/5 = 7/20
    => 3,2x = 7/20 + 2/5
    => 3,2x = 3/4
    => x  = 3/4 : 3,2
    => x  = 15/64
    Vậy x=15/64
    d)
    (3/5x – 2/3x – x) . 1/7 = -5/21
    => 3/5x – 2/3x – x = -5/21 : 1/7
    => x  (3/5 – 2/3 -1) = -5/3
    => -16/15 .x  = -5/3
    => x = -5/3 : (-16)/15
    => x = 25/16
    Vậy x=25/16

  2. hiennhi98
    hiennhi98
    23 Tháng Mười Hai, 2022 at 5:56 chiều
    Reply
    Bạn xem hình. 

    toan-lop-6-a-8-15-5-7-2-21-b-2-3-3-2-25-9-6-c-3-2-4-5-2-3-11-3-7-20-d-3-5-2-3-1-7-5-21-lam-ho-nh

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

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