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

Toán Lớp 6: A)9+ X= 20 B)X-9=-7 C)2*X+5=-3

Toán Lớp 6: A)9+ X= 20
B)X-9=-7
C)2*X+5=-3

Comments ( 2 )

  1. a) 9 + x = 20
        x = 20 – 9
        x = 11
     Vậy x = 11
    b) x – 9 = -7
        x = -7 + 9
        x = 9 – 7
        x = 2
     Vậy x = 2
    c) 2 . x + 5 = -3
        2 . x = -3 – 5
        2 . x = -8
        x = ( -8 ) : 2
        x = -4
     Vậy x = -4

  2. A) 9+ x= 20
         x=20-9
         x=11
    B) x-9=-7
        x=-7+9
        x=2
    C) 2 xx x+5=-3
        2 xx x=-3-5
        2 xx x=-8
        x= -8 -: 2
        x=-4

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

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