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

Toán Lớp 6: Tìm x biết : ( 4x – 15)^3 = 125

Toán Lớp 6: Tìm x biết :
( 4x – 15)^3 = 125

Comments ( 2 )

  1. (4x – 15)^3 = 125
    (4x – 15)^3 = 5^3
    4x – 15 = 5
    4x = 15 + 5
    4x = 20
    x = 20 : 4
    x = 5

  2.  
    Lời giải và giải thích chi tiết:
     $(4x-15)^{3}=125$
    $=>(4x-15)^{3}=5^{3}$
    $=>4x-15=5$
    $=>4x=5+15$
    $=>4x=20$
    $=>x=20:4$
    $=>x=5$
    Vậy x=5

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