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

Toán Lớp 6: BT1 Tìm X :a) x-36:18=12 b) (x-36):18=12 c)[(6x-39):7] .4=12

Toán Lớp 6: BT1 Tìm X :a) x-36:18=12 b) (x-36):18=12 c)[(6x-39):7] .4=12

Comments ( 2 )

  1. a) x-36:18=12
        x- 2  =12(nhân chia trước)
        x=12+2
        x=14
    b)(x-36):18=12
        x-36=12.18
        x-36=216
        x=216+36
        x=252
    c)[(6x-39):7].4=12
       (6x-39):7=12:4
       (6x-39):7=3
       6x-39=3.7
       6x-39=21
        6x=21+39
        6x=60
          x=60:6=10
    @Chucbanhoctot!
     

  2. a,
    x – 36 : 18 = 12
    => x – 2 = 12
    => x = 12 + 2
    => x = 14
    Vậy x = 14
    b,
    (x – 36) : 18 = 12
    => x – 36 = 12 xx 18
    => x – 36 = 216
    => x = 216 + 36
    => x = 252
    Vậy x = 252
    c,
    [(6x – 39) : 7] . 4 = 12
    => (6x – 39) : 7 = 12 : 4
    => (6x – 39) : 7 = 3
    => 6x – 39 = 3 . 7
    => 6x – 39 = 21
    => 6x = 21 + 39
    => 6x = 60
    => x = 10
    Vậy x = 10
     

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