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

Toán Lớp 6: Tìm x, biết : a) x-17=5+2/3 b) 17+x=2/3 c) x+15/2=22/4. d) 12 : x = 1/24.

Toán Lớp 6: Tìm x, biết :
a) x-17=5+2/3
b) 17+x=2/3
c) x+15/2=22/4.
d) 12 : x = 1/24.

Comments ( 2 )

  1. a)x-17=5+2/3
    =>x-17=17/3
    =>x=17/3+17
    =>x=17/3+51/3
    =>x=68/3
    b)17+x=2/3
    =>x=2/3-17
    =>x=2/3-51/3
    =>x=-49/3
    c)x+15/2=22/4
    =>x=22/4-15/2
    =>x=22/4-30/4
    =>x=(-8)/4=-2
    d)12 : x = 1/24
    x=12:1/24
    x=12.24
    x=228

  2. a, x – 17 = 5 + 2/3
    => x – 17 = 17/3
    => x = 17/3 + 17
    => x = 68/3
    b, 17 + x = 2/3
    => x = 2/3 – 17
    => x = -49/3
    c, x + 15/2 = 22/4
    => x = 22/4 – 15/2
    => x = -2
    Vậy x = -2
    d, 12 : x = 1/24
    => x = 12 : 1/24
    => x = 12. 24
    => x = 288
    Vậy x = 288

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

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