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

=>-2x=0

hay x=0

\(\Leftrightarrow36-2x=36\)

=>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

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.`

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

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

41-2.x-5=720:40

41-2.x-5=18

41-2.x=18+5

41-2.x=23

2.x=41-23

2.x=18

x=18:2

X=9

720 : (41 - 2.x-5) = 2³.5

720 :  (41 - 2x - 5) = 8. 5

720 :  (41 - 2x - 5) = 40

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

 41 - 2x - 5 =     18

 41 - 2x      =18 + 5

41 - 2x      =    23

       2x      = 41 - 23

       2x      =    18

        x        = 18 : 2

        x        =    9

Li-ke mik nhé! Có ji ko hiểu thì cứ hỏi nha

9 \(hjm\)

720:[41-(2.X-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-(2.X-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

\(720-\left[41-\left(2\times x-5\right)\right]=420\)

\(\Rightarrow41-\left(2\times x-5\right)=720-420\)

\(\Rightarrow41-\left(2\times x-5\right)=300\)

\(\Rightarrow2\times x-5=41-300\)

\(\Rightarrow2\times x-5=-259\)

\(\Rightarrow2\times x=-259+5\)

\(\Rightarrow2\times x=-254\)

\(\Rightarrow x=-254:2\)

\(\Rightarrow x=-127\)

Vậy \(x=-127\)

Học tốt # ^-<

720−[41−(2×x−5)]=420

⇒41−(2×x−5)=720−420

⇒41−(2×x−5)=300

⇒2×x−5=41−300

⇒2×x−5=−259

⇒2×x=−259+5

⇒2×x=−254

⇒x=−254:2

⇒x=−127

Vậy x=−127

\(720-\left[41-\left(2x-5\right)\right]=420\)

\(\Leftrightarrow\)\(41-\left(2x-5\right)=720-420=300\)

\(\Leftrightarrow\)\(2x-5=41-300=-259\)

\(\Leftrightarrow\)\(2x=-259+5=-254\)

\(\Leftrightarrow\)\(x=-127\)

Vậy...