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

Toán Lớp 6: Tìm x thuộc Z: ( 4x + 11 )-( x + 34 ) = 67 Cảm ơn mn tr nha!

Toán Lớp 6: Tìm x thuộc Z:
( 4x + 11 )-( x + 34 ) = 67
Cảm ơn mn tr nha!

Comments ( 2 )

  1. \text{@Nem}
    (4x+11)-(x+34)=67
    4x+11-x-34=67
    (4x-x)-(34-11)=67
    3x – 23 = 67
    3x = 67+23
    3x = 90
    x=90:3
    x=30 (Thỏa Mãn)
    Vậy x=30

  2. ( 4x + 11 ) – ( x + 34 ) = 67
    => 4x + 11 – x – 34 = 67
    => ( 4x – x ) + ( 11 – 34 ) = 67
    => 3x – 23 = 67
    => 3x = 67 + 23
    => 3x = 90
    => x = 90 : 3
    => x = 30
      $\text{ Vậy x = 30 }$
     

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

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