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

41-(2x-5)=18

2x-5=41-18

2x-5=23

2x=23+5

2x=28

suy ra x=14

suy ra x=14

đề bài là gì

(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

\(\Leftrightarrow36-2x=36\)

=>x=0

x = 14

720: [41-(2x+5)]=8 x 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   =18

              x   =18:2

             x    =9

\(\Leftrightarrow41-2x+5=720:20=36\)

=>-2x=0

hay x=0

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

\(720:\left[41-\left(2x-5\right)\right]=2^3\cdot5\)

\(\Rightarrow720:\left(41-2x+5\right)=8\cdot5\)

\(\Rightarrow720:\left(46-2x\right)=40\)

\(\Rightarrow46-2x=720:40\)

\(\Rightarrow46-2x=18\)

\(\Rightarrow2x=46-18\)

\(\Rightarrow2x=28\)

\(\Rightarrow x=28:2\)

\(\Rightarrow x=14\)

`@` `\text {Ans}`

`\downarrow`

`d)`

`720 \div [41 - (2x - 5)] = 2^3 * 5`

`=> 720 \div [41 - (2x - 5)] = 40`

`=> 41 - (2x - 5) = 720 \div 40`

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

`=> 2x - 5 = 41 - 18`

`=> 2x - 5 = 23`

`=> 2x = 23 + 5`

`=> 2x = 28`

`=> x = 28 \div 2`

`=> x = 14`

Vậy, `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

\(\left(2x-4\right)^3=8=2^3\)

\(2x-4=2\)

\(2x=6\)

\(x=3\)

a) (2x -4)³ =2³                                                                           b)

=>2x -4 =2

2x =6

x     =3

a) ( 2x - 4 )³ = 8

=>( 2x - 4 )³ = 2³

=> 2x - 4 = 2

=> 2x = 6

=> x = 3

b) 720 : [ 41 - ( 2x - 5 ) ] = 2³ . 5

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

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

=> 2x - 5 = 23

=> 2x = 28

=> x = 14