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

Toán Lớp 5: Giúp e ạ tìm x: x+12-13=55 55-12-x=17

Toán Lớp 5: Giúp e ạ
tìm x:
x+12-13=55
55-12-x=17

Comments ( 2 )

  1. x + 12 – 13 = 55
    x + 12         = 55 + 13
    x + 12         = 68
    x                 = 68 – 12
    x                 = 66
    55 – 12 – x = 17
        43  –  x  = 17
                  x  =  43 – 17
                  x  = 26
    Chúc b học tốt. Xin hay nhất, tks!
    @Suziez

  2. x + 12 – 13 = 55
    x + 12 = 68
    x = 68 – 12
    x = 56
    55 – 12 – x = 17
    43 – x = 17
    x = 43 – 17
    x = 26
    Gửi bạn!
     

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

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