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

Toán Lớp 6: 2021^2020 x ( 2x -5 ) =2021 ^2021

Toán Lớp 6: 2021^2020 x ( 2x -5 ) =2021 ^2021

Comments ( 2 )

  1. 2021^2020 xx ( 2x -5 ) =2021 ^2021
                            2x- 5   = 2021 ^2021 : 2021^2020
                            2x-5    = 2021
                            2x        = 2021 + 5
                            2x         = 2026
                              x         =  2026 : 2
                              x          = 1013

  2. Lời giải:
    2021^(2020)×(2x-5)=2021^2021
    ⇒2x-5=2021^(2021)÷2021^2020
    ⇒2x-5=2021^(2021-2020)
    ⇒2x-5=2021
    ⇒2x=2021+5
    ⇒2x=2026
    ⇒x=2026÷2
    ⇒x=1013
    Vậy x=1013

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

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