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

Toán Lớp 6: 8) A) x 3 = 27 B) (2× – 1)³ = 8

Toán Lớp 6: 8)
A) x 3 = 27
B) (2× – 1)³ = 8

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    8a)
    x.3 = 27
    x = 27:3
    x =9
    8b)
    (2x – 1)^3 = 8
    (2x – 1)^3 = 2^3
    2x – 1 = 2
    2x = 2 + 1
    2x = 3
    x = 3:2
    x = 3/2
    @Ryan
     

  2. a) 3x = 27
    x = 27 : 3
    x = 9
    – Vậy x = 9
    b) ( 2x – 1 )^3 = 8
    ( 2x – 1 )^3 = 2^3
    2x – 1 = 2
    2x = 2 + 1
    2x = 3
    x = 3 : 2
    x = 3/2 
    – Vậy x = 3/2
    @Rin

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

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