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

Toán Lớp 6: 1/2.x+2/3.(x-1)=1/3 giải giúp em với ạ , em cảm ơn

Toán Lớp 6: 1/2.x+2/3.(x-1)=1/3
giải giúp em với ạ , em cảm ơn

Comments ( 2 )

  1. 1/2 . x + 2/3 . ( x – 1) = 1/3
    1/2 . x + 2/3 . x – 2/3 . 1 = 1/3
    (1/2 + 2/3) x – 2/3           = 1/3
    7/6 . x                              = 1/3 + 2/3
    7/6 . x                              =1
          x                                = 1 : 7/6
        x                                     = 6/7
    Vậy x = 6/7

  2. 1/2x + 2/3(x-1) =1/3
    -> 1/2x + 2/3x – 2/3 = 1/3
    -> 1/2x + 2/3x = 1/3 + 2/3 =1
    -> 7/6x = 1
    -> x = 1 : 7/6 = 6/7
    Vậy x = 6/7

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