(2x - 4)³ = 8

(2x - 4)³ = 2³

2x - 4 = 2

2x = 2 + 4

2x = 6

x = 6 : 2

x = 3

\(\frac{720}{41-\left(2x-5\right)}=2^3\times5\)

\(\frac{720}{41-2x+5}=8\times5\)

\(46-2x=\frac{720}{40}\)

\(2x=46-18\)

2x = 28

x = 28 : 2

x = 14

720 : [ 41 - ( 2x - 5 ) ] = 2³ . 5

720 : [ 41 - ( 2x - 5 ) ] = 40

 [ 41 - ( 2x - 5 ) ]  = 720 : 40

  41 - ( 2x - 5 ) = 18

2x - 5 = 41 - 18

2x - 5 = 23

2x = 23  + 5

2x = 28

x = 28 : 2

x = 14

Vậy x = 14

a. 720 : [ 41 - ( 2x - 5 ) ] = 2³ . 5

=> 720 : [ 41 - (2x-5) ] = 8.5

=> 720 : [ 41 - (2x-5) ] = 40

=> 41 - (2x-5) = 720 : 40

=> 41 - (2x-5) = 18

=> 2x - 5 = 41 - 18

=> 2x - 5 = 23

=> 2x = 23 + 5

=> 2x = 28

=> x = 28 : 2

=> x = 14 thuộc Z

vậy______

b. ( 3x - 2⁴ ) . 7⁴ = 2.7⁵

=> 3x-16 = 2.7⁵ : 7⁴

=> 3x - 16 = 2.7

=> 3x - 16 = 14

=> 3x = 14 + 16

=> 3x = 30

=> x = 30 : 3

=> x = 10 thuộc Z

vậy_____

a: Sửa đề: (2x-4)(3-x)=0

=>\(\left[\begin{array}{l}2x-4=0\\ 3-x=0\end{array}\right.\Rightarrow\left[\begin{array}{l}2x=4\\ x=3\end{array}\right.\Rightarrow\left[\begin{array}{l}x=2\\ x=3\end{array}\right.\)

b: \(720:\left\lbrack41-\left(2x-5\right)\right\rbrack=2^2\cdot5\)

=>\(720:\left(41-2x+5\right)=4\cdot5=20\)

=>720:(46-2x)=20

=>46-2x=720:20=36

=>2x=46-36=10

=>x=5

c: 15-x=7-(-2)

=>15-x=7+2

=>15-x=9

=>x=15-9=6

720 : [ 41 - (2x - 5) ] = 8 . 5

x=14

đảm bảo đúng 100% nếu sai cứ bảo mình

k mình nha^_^

720 : [41 - (2x - 5)] = 8 . 5

720 : [41 - (2x - 5)] = 40

[41 - (2x - 5)] = 720 : 40 

41 - (2x - 5) = 18

(2x - 5) = 41 - 18

2x - 5 = 23

2x = 23 + 5

2x = 28

x = 28 : 2

x = 14

\(720:[41-\left(2x-5\right)]=2^3.5\)

\(720:[41-\left(2x-5\right)]=8.5\)

\(720:[41-\left(2x-5\right)]=40\)

\(41-\left(2x-5\right)=720:40\)

\(41-\left(2x-5\right)=18\)

\(2x-5=41-18\)

\(2x-5=23\)

\(2x=23+5\)

\(2x=28\)

\(x=28:2\)

\(x=14\)

720 : [(5 - 2x) - (-41)] = 2³ . 5

720 : [(5 - 2x) + 41] = 8 . 5

720 : [(5 - 2x) + 41] = 40

(5 - 2x) + 41 = 720 : 40

(5 - 2x) + 41 = 18

5 - 2x = 18 - 41

5 - 2x = -23

2x = 5 - (-23) = 5 + 23

2x = 28

x = 28 : 2 = 14

=> x = 14

(12x-4³).8³=4.8⁴

=> 12x-4³=4.8⁴:8³

=> 12x-64=4.8

=> 12x-64=32

=> 12x=32+64

=> 12x=96

=> x=8

720:[41-(2x-5)]=2³.5

=> 720:[41-(2x-5)]=40

=> 41-(2x-5)=720:40

=> 41-(2x-5)=18

=> 2x-5=41-18

=> 2x=23+5

=> 2x=28

=> x=14

720:[41-(2x-5)]=2³.5

720:[41-(2x-5)]=8.5

720:[41-(2x-5)]=40

41-(2x-5)=720:40

41-(2x-5)=18

2x-5=41-18

2x-5=23

2x=23+5

2x=28

x=28:2

x=14

Vậy x=14