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

Toán Lớp 6: giup minh voi moi nguoi oi(2x+2⁴)•5³=4•5⁵

Toán Lớp 6: giup minh voi moi nguoi oi(2x+2⁴)•5³=4•5⁵

Comments ( 2 )

  1. Answer
    (2x + 2^{4}) . 5^{3} = 4 . 5^{5}
    $\Rightarrow$ (2x + 16) = 4 . 5^{5} : 5^{3}
    $\Rightarrow$ (2x + 16) = 4 . 5^{2}
    $\Rightarrow$ (2x + 16) = 4 . 25
    $\Rightarrow$ 2x + 16 = 100
    $\Rightarrow$ 2x = 100 – 16
    $\Rightarrow$ 2x = 84
    $\Rightarrow$ x = 84 : 2
    $\Rightarrow$ x = 42
    $\text{Vậy}$ x = 42

  2. Giải đáp + Lời giải và giải thích chi tiết:
    (2x+2^4).5^3=4.5^5
    (2x+2^4)=4.5^5:5^3
    (2x+2^4)=4.5^2=4.25
    (2x+16)=100 
    2x=100-16
    2x=84
      x=84:2
      x=42
    Vậy x=42 

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