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

Toán Lớp 6: 20 : (x + 1) = 2 ; lm giúp mik .

Toán Lớp 6: 20 : (x + 1) = 2 ; lm giúp mik
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Comments ( 2 )

  1. 20:(x+1)=2
    ⇔x+1=20:2
    ⇔x+1=10
    ⇔x=10-1
    ⇔x=9
    Vậy x=9
     

  2. $\text{20 : (x+1) = 2}$
    ⇒ x + 1 = 20 : 2
    ⇒ x + 1 = 10
    ⇒ x= 10 – 1
    ⇒ x= 9
    Vậy x = 9

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

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