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

Toán Lớp 6: b/ [(5x – 18) : 3 + 52 ] . 2 – 31 =91

Home/ Toán Lớp 6: b/ [(5x – 18) : 3 + 52 ] . 2 – 31 =91

Toán Lớp 6: b/ [(5x – 18) : 3 + 52 ] . 2 – 31 =91

Tháng Năm 20, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: b/ [(5x – 18) : 3 + 52 ] . 2 – 31 =91

Comments ( 2 )

  1. mytamhoang
    mytamhoang
    20 Tháng Năm, 2022 at 12:40 sáng
    Reply
    b) [(5x-18) : 3 + 52] . 2 – 31 = 91
    <=> [(5x-18) : 3 + 52].2 = 91 + 31
    <=> [(5x-18) : 3 + 52].2 = 122
    <=> (5x-18) : 3 + 52 = 122 :2
    <=> (5x-18) : 3 + 52 = 61
    <=> (5x-18) : 3 = 61 – 52
    <=> (5x-18) : 3 = 9
    <=> 5x – 18 = 9.3
    <=> 5x – 18 = 27
    <=> 5x = 27+18
    <=> 5x = 45
    <=> x = 45:5
    <=> x= 9
    Vậy x = 9 

  2. kymmailien
    kymmailien
    20 Tháng Năm, 2022 at 12:40 sáng
    Reply
    [(5x – 18) : 3 + 52] . 2 – 31 = 91
    [(5x – 18 ) : 3 + 52] . 2 = 91 + 31
    [(5x – 18 ) : 3 + 52] . 2 = 122
    (5x – 18 ) : 3 + 52 = 122 : 2
    (5x – 18 ) : 3 + 52 = 61
    (5x – 18 ) : 3 = 61 – 52
    (5x – 18 ) : 3 = 9
    5x – 18 = 9 . 3
    5x – 18 = 27
    5x = 27 + 18
    5x = 45
      x = 45 : 5
      x = 9
    Vậy x = 9
    #dtkc

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

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