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

Toán Lớp 8: x-12/21 + x-10/23 = x-8/25 + x-6/27

Home/ Toán Lớp 8: x-12/21 + x-10/23 = x-8/25 + x-6/27

Toán Lớp 8: x-12/21 + x-10/23 = x-8/25 + x-6/27

Tháng Mười 11, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: x-12/21 + x-10/23 = x-8/25 + x-6/27

Comments ( 2 )

  1. mytamhoang
    mytamhoang
    11 Tháng Mười, 2022 at 6:55 chiều
    Reply
    $\\$
    (x-12)/21+(x-10)/23=(x-8)/25+(x-6)/27
    ->(x-12)/21 – 21/21 + (x-10)/23-23/23 = (x-8)/25-25/25 + (x-6)/27-27/27
    -> (x-33)/21 + (x-33)/23 = (x-33)/25 + (x-33)/27
    -> (x-33)/21 + (x-33)/23 – (x-33)/25 – (x-33)/27=0
    -> (x-33)(1/21 + 1/23 – 1/25 – 1/27)=0
    Do 1/21 + 1/23 – 1/25 – 1/27\ne 0
    ->x-33=0
    ->x=33
    Vậy x=33
     

  2. kymmailien
    kymmailien
    11 Tháng Mười, 2022 at 6:55 chiều
    Reply
    x-12/21 + x-10/23 = x-8/25 + x-6/27
    <=>x-12/21-1+x-10/23-1=x-8/25-1+x-6/27-1
    <=>x-33/21+x-33/23=x-33/25+x-33/27
    <=>x-33/21+x-33/23-x-33/25-33/27=0
    <=>(x-33)(1/21+1/23+1/25+1/27)=0
    mà  1/21+1/23+1/25+1/27)$\neq$ 0
    =>x-33=0
    =>x=33

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

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