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

Toán Lớp 6: Tìm x thuộc n,biết :a)(2x-4)-2=2⁴

Toán Lớp 6: Tìm x thuộc n,biết :a)(2x-4)-2=2⁴

Comments ( 2 )

  1. Answer
    (2x – 4) – 2 = 2^{4}
    => (2x – 4) – 2 = 16
    => (2x – 4) = 16 + 2
    => 2x – 4 = 18
    => 2x = 18 + 4
    => 2x = 22
    => x = 22 : 2
    => x = 11
    $\text{Vậy}$ x = 11

  2. a) (2x – 4) – 2 = $2^{4}$ với x ∈ N
        2x – 4 – 2 = 16
        2x – 6 = 16 
        2x = 6 + 16
        2x = 22
          x = 22 : 2
          x = 11 (t/m)
    Vậy x = 11
    $\textit{Ha1zzz}$

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