Question

(2x-5)^3.3=81

tìm x.Ai trả lời nhanh mình k cho

Answer 1

Ta có: (2x-5)^3.3=81

=> (2x-5)^3 = 81:3 = 27

Mà 3^3 = 27

=> (2x-5)^3 = 3^3

=> 2x-5 = 3

=> 2x = 8

=> x = 4

Answer 2

( 2x - 5 )^3 = 81 : 3

( 2x - 5 )^3 = 27 
( 2x - 5 )^3 = 3^3
  2x - 5       = 3

  2x            = 3 + 5
  2x            = 8

    x            = 8 : 2

   x             = 4

Answer 3

Ta có: (2x-5)^3.3=81

=> (2x-5)^3 = 81:3 = 27

Mà 3^3 = 27

=> (2x-5)^3 = 3^3

=> 2x-5 = 3

=> 2x = 8

=> x = 4

Answer 4

\(\left(2x-5\right)^3.3=81\)

\(\left(2x-5\right)^3.3=3^4\)

\(\left(2x-5\right).3=3\)

\(2x-5=3:3\)

\(2x-5=1\)

\(2x=1+5\)

\(2x=6\)

\(x=6:2\)

\(x=3\)

k mình nhé

Answer 5

(2x - 5)³ . 3 = 81

(2x - 5)³ = 81 : 3

(2x - 5)³ = 27

(2x - 5)³ = 3³

=> 2x - 5 = 3

=> 2x = 3 + 5

=> 2x = 8

=> x = 8 : 2

=> x = 4