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

Toán Lớp 6: A:11X-30=3MU2021:3MU2020 , b: 150-2(X-5)=30

Toán Lớp 6: A:11X-30=3MU2021:3MU2020 , b: 150-2(X-5)=30

Comments ( 2 )

  1. Giải đáp:
    a, 3
    b, 65
    Lời giải và giải thích chi tiết:
    a, 11x – 30 = 3^2021 : 3^2020
    => 11x – 30 = 3
    => 11x = 3 + 30
    => 11x = 33
    => x = 33 : 11
    => x = 3
    Vậy x = 3
    b, 150 – 2(x – 5) = 30
    => 2(x – 5) = 150 – 30
    => 2(x – 5) = 120
    => x – 5 = 120 : 2
    => x – 5 = 60
    => x = 60 + 5
    => x = 65
    Vậy x = 65

  2. a) 11x – 30 = 3^2021 : 3^2020
    11 . x = 3 + 30
    x = 33 : 11
    x = 3
    $\textit{Vậy x = 3}$
    b) 150 – 2 ( x – 5 ) = 30
    2 . ( x – 5 ) = 150 – 30
    x – 5 = 120 : 2
    x = 60 + 5
    x = 65
    $\textit{Vậy x = 65}$

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

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