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

Toán Lớp 7: (x+1)/2021 +(x+2) /20122= (x+3)/2023+ (x+4)/2024

Tháng Mười Hai 15, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: (x+1)/2021 +(x+2) /20122= (x+3)/2023+ (x+4)/2024

Comments ( 2 )

  1. tuyen98
    tuyen98
    15 Tháng Mười Hai, 2022 at 9:10 chiều
    Reply
    $\text{(☞ﾟヮﾟ)☞  Uy tín nha  ☜(ﾟヮﾟ☜)}$
    $\text{© Bản quyền thuộc về youtubehieuvip22}$
    $\text{© Copyright by Hieuvip22 ☞ Do not Reup}$
    (x+1)/2021 +(x+2) /2022= (x+3)/2023+ (x+4)/2024
    (x+1)/2021 -1+(x+2) /2022 -1= (x+3)/2023 -1+ (x+4)/2024 -1
    (x-2020)/2021+(x-2020)/2022=(x-2020)/2023+(x-2020)/2024
    (x-2020)(1/20212021+1/2022-1/2023-1/2024)=0
    => x=2020
    $\text{Vì}$
    1/20212021+1/2022-1/2023-1/2024>0
     

  2. baoquyen
    baoquyen
    15 Tháng Mười Hai, 2022 at 9:10 chiều
    Reply
    (x+1)/2021+(x+2)/2022=(x+3)/2023+(x+4)/2024
    ⇔(x+1)/2021-1+(x+2)/2022-1=(x+3)/2023-1+(x+4)/2024-1
    ⇔(x+1-2021)/2021+(x+2-2022)/2022=(x+3-2023)/2023+(x+4-2024)/2024
    ⇔(x-2020)/2021+(x-2020)/2022-(x-2020)/2023-(x-2020)/2024=0
    ⇔(x-2020)(1/2021+1/2022-1/2023-1/2024)=0
    ⇔x-2020=0
    ⇔x=2020
    Vậy x=2020
     

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

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