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

Toán Lớp 6: a) (x : 7 – 7)(x : 12 – 12) = 0 b) (x -5): 3 + 3 = 24; c) (x-4) : 3 -2 = 100

Toán Lớp 6: a) (x : 7 – 7)(x : 12 – 12) = 0
b) (x -5): 3 + 3 = 24;
c) (x-4) : 3 -2 = 100

Comments ( 2 )

  1. a) (x : 7 – 7)(x : 12 – 12) = 0
    Xét x : 7 – 7 = 0
    => x : 7 = 7
    => x = 49
    Xét x : 12 – 12 = 0
    => x : 12 = 12
    => x = 144
    Vậy x = 49 hoăc 144
    b) (x -5): 3 + 3 = 24
    => (x -5): 3 = 21
    => x -5 = 63
    => x = 68
    Vậy x = 68
    c) (x-4) : 3 -2 = 100
    => (x-4) : 3 = 102
    => x-4 = 306
    => x = 310
    Vậy x = 310
    (Chúc bạn học tốt)
     

  2. a) (x : 7 – 7)(x : 12 – 12) = 0
    =>x : 7 – 7=0 hoặc x : 12 – 12=0
    =>x:7=7 hoặc x:12=12
    =>x=49 hoặc x=144
    Vậy x=49;x=144
    b)
    (x -5): 3 + 3 = 24
    =>(x-5):3=21
    =>x-5=62
    =>x=68
    Vậy x=68
    c)
    (x-4) : 3 -2 = 100
    =>(x-4):3=102
    =>x-4=306
    =>x=310
    Vậy x=310
     

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

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