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

Toán Lớp 7: `Tìm x\:\ x – 9^2 = 20^2 – 3` x `127`

Toán Lớp 7: Tìm x\:\ x – 9^2 = 20^2 – 3 x 127

Comments ( 2 )

  1. $\text{x-9²=20²-3×127}$
    $\text{x-81=400-381}$
    $\text{x-81=19}$
    $\text{x=19+81}$
    $\text{x=100}$
    $\text{Vậy x=100}$

  2. Giải đáp + Lời giải và giải thích chi tiết:
    x-9^2=20^2-3.127
    =>x-81=400-381
    =>x-81=19
    =>x=19+81
    =>x=100
     

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

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