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

Toán Lớp 6: 12 x ( X – 1 ) : 3 = 4 ngũ3+2 ngũ3

Toán Lớp 6: 12 x ( X – 1 ) : 3 = 4 ngũ3+2 ngũ3

Comments ( 2 )

  1. 12xx(x-1):3=4^3 + 2^3
    =>12xx(x-1):3=72
    =>12xx(x-1)=72*3=216
    =>x-1=216:12=18
    =>x=18+1=19
    Vậy x=19
     

  2. 12 . (x – 1) : 3 = 4^3 + 2^3
    => 12 . (x – 1) : 3 = 64 + 8 = 72 
    => 12 . (x – 1) = 72 . 3 = 216
    => x – 1 = 216 : 12 = 18
    => x = 18 + 1
    => x = 19
    Vậy x = 19

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

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