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

Toán Lớp 7: `Tìm\ x:\ x – 10^2 = 3^2 . 10^2`

Toán Lớp 7: Tìm\ x:\ x – 10^2 = 3^2 . 10^2

Comments ( 2 )

  1. x – 10^2 = 3^2 . 10^2
    ⇔ x – 100 = 9 . 100
    ⇔ x – 100 = 900
    ⇔ x = 900 + 100
    ⇔ x = 1000
    Vậy , x = 1000 .

  2.  x-10^2=3^2. 10^2
    <=>x-10^2=30^2
    <=>x=30^2+10^2
    <=>x=1000
    Vậyx=1000

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