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

Toán Lớp 7: (3x-2/3)^3=125 giúp mik vssssssssssssssssssssssssssssssssss

Home/ Toán Lớp 7: (3x-2/3)^3=125 giúp mik vssssssssssssssssssssssssssssssssss

Toán Lớp 7: (3x-2/3)^3=125 giúp mik vssssssssssssssssssssssssssssssssss

Tháng Tư 17, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: (3x-2/3)^3=125
giúp mik vssssssssssssssssssssssssssssssssss

Comments ( 2 )

  1. lanngocha
    lanngocha
    17 Tháng Tư, 2022 at 12:10 chiều
    Reply
    (3x – 2/3)^3 = 125
    => (3x – 2/3)^3 = 5^3
    => 3x – 2/3 = 5
    => 3x = 5 + 2/3
    => 3x = 17/3
    => x = 17/3 : 3
    => x = 17/9
    Vậy x = 17/9
     

  2. lantrungbach
    lantrungbach
    17 Tháng Tư, 2022 at 12:09 chiều
    Reply
    $( 3x – \dfrac{2}{3} )^3$ $=$ $125$
    $\Rightarrow$ $( 3x – \dfrac{2}{3} )^3$ $=$ $5^3$
    $\Rightarrow$ $3$x $-$ $\dfrac{2}{3}$ $=$ 5
    $\Rightarrow$ $3x$ $=$ $5$ $+$ $\dfrac{2}{3}$ 
    $\Rightarrow$ $3x$ $=$ $\dfrac{17}{3}$ 
    $\Rightarrow$ $x$ $=$ $\dfrac{17}{3}$ : $3$
    $\Rightarrow$ $x$ $=$ $\dfrac{17}{9}$
      $Vậy$ $x$ $=$ $\dfrac{17}{9}$
     

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

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