Question

720:[41-(2x-5)]=2 mũ 3.5

dấu chấm là nhân đó

Answer 1

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 = 14

Answer 2

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

=> 46-2x= 720:40

=> 46-2x= 18

=> 2x= 28

=> x=14

Vậy x=14

Answer 3

\(720:[41-(2x-5)]=2^3\times5\)

\(\Leftrightarrow720\div[41-2x+5]=40\)

\(\Leftrightarrow46-2x=720\div40\)

\(\Leftrightarrow46-2x=18\)

\(\Leftrightarrow2x=28\)

\(\Leftrightarrow x=14\)