\(720:\left[41-\left(2x-5\right)\right]=120\)
\(\Leftrightarrow41-\left(2x-5\right)=6\)
\(\Leftrightarrow2x-5=35\)
\(\Leftrightarrow2x=40\)
\(\Leftrightarrow x=20\)
hok tốt!
720 : [ 41 - ( 2x - 5 ) ] = 120
41 - ( 2x - 5 ) ] = 720 : 120 = 6
2x - 5 = 41 - 6 = 35
2x = 35 + 5 = 40
x = 40 : 2 = 20
Học tốt
720 : [ 41 - ( 2x - 5 ) ] = 120
=> 41 - ( 2x - 5 ) = 720 : 120
=> 41 - ( 2x - 5 ) = 6
=> 2x - 5 = 41 - 6
=> 2x - 5 = 35
=> 2x = 35 + 5
=> 2x = 40
=> x = 40 : 2
=> x = 20
Vậy x = 20
