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

Toán Lớp 6: 240:(x-5)=2²×5²-20 ai giải được mình cho 5sao

Toán Lớp 6: 240:(x-5)=2²×5²-20 ai giải được mình cho 5sao

Comments ( 2 )

  1. 240 : (x – 5) = 2^{2} . 5^{2} – 20
    $\Rightarrow$ 240 : (x – 5) = 4 . 25 – 20
    $\Rightarrow$ 240 : (x – 5) = 100 – 20
    $\Rightarrow$ 240 : (x – 5) = 80
    $\Rightarrow$ (x – 5) = 240 : 80
    $\Rightarrow$ x – 5 = 3
    $\Rightarrow$ x = 3 + 5
    $\Rightarrow$ x = 8
    $\text{Vậy}$ x = 8
     

  2. Giải đáp:
     240:(x-5)=4×25-20
    240:(x-5)=80
    x-5=240÷80
    x-5=3
    x=3+5
    x=8
     

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