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

Toán Lớp 6: 2x(x+3)-13=11 Giúp mk câu này nha

Toán Lớp 6: 2x(x+3)-13=11
Giúp mk câu này nha

Comments ( 2 )

  1. 2x(x+3)-13=11
    =>2x(x+3)=11+13
    =>2x(x+3)=24
    =>x+3=24 : 2
    => x+3= 12
    =>x=12 -3
    =>x=9

  2. 2 . ( x + 3 ) – 13 = 11 
    2 . ( x + 3 ) = 11 + 13
    2 . ( x + 3 ) = 24
    x + 3 = 24 : 2
    x + 3 = 12
    x = 12 – 3
    x = 9
    Vậy x = 9
     

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

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