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

Toán Lớp 7: `Tìm\ x:\ x – 2^2 + 8^2 = 10^2 – 6^2`

Toán Lớp 7: Tìm\ x:\ x – 2^2 + 8^2 = 10^2 – 6^2

Comments ( 2 )

  1. $\text{Giải đáp + Lời giải và giải thích chi tiết:}$
    $\text{x – 2^2 + 8^2=10^2 – 6^2}$
    $\text{x – 2^2 + 8^2=100 – 36}$
    $\text{x – 2^2 + 8^2=64}$
    $\text{x – 2^2           =64 – 8^2}$
    $\text{x – 2^2           =64 – 64}$
    $\text{x – 4                =0}$
    $\text{x                      =4 + 0}$
    $\text{x                      =4}$
    $\text{Vậy x=4}$
    $\text{No copy!}$
    $\text{#phungducanh9888}$

  2. x-2²+8²=10²-6²
    ⇔x-4+64=100-36
    ⇔x+60=64
    ⇔x=64-60
    ⇔x=4
    Vậy x=4
     

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