720 : [ 41 - ( 2x - 5 ) ] = 40
41 - ( 2x - 5 ) = 720 : 40
41 - ( 2x - 5 ) = 18
2x - 5 = 41 - 18
2x - 5 = 23
2x = 28
x = 14
k nha , minh k lai
720/[41-(2x-5)]=40
<=>41-(2x-5)=18
2x-5=23
x=14.
3636/(12x-91)=36
12x-91=101
12x=192
x=16.
Nguồn:xmen
aihihi
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k mk nhé
\(720:\left[41-\left(2x-5\right)\right]=40\)
\(\Leftrightarrow\left[41-\left(2x-5\right)\right]=720:40\)
\(\Leftrightarrow41-\left(2x-5\right)=18\)
\(\Leftrightarrow2x-5=41-18\)
\(\Leftrightarrow2x-5=23\)
\(\Leftrightarrow2x=28\)
\(\Leftrightarrow x=14\)
720 : [41 - (2x - 5) ] = 40
\(\Rightarrow\)41 - (2x - 5) = 720 : 40 = 18
\(\Rightarrow\)2x - 5 = 41 - 18 = 23
\(\Rightarrow\)x = (23 + 5) : 2 = 14
Vậy giá trị của x là 14
\(720:\left[41-\left(2x-5\right)\right]=40\)
\(\Rightarrow41-\left(2x-5\right)=\frac{720}{40}\)
\(\Rightarrow41-2x+5=18\)
\(\Rightarrow-2x=-28\)
\(\Rightarrow x=14\)
41-2.x-5=720:40
41-2.x-5=18
2.x-5=41-18
2.x-5=23
2.x=23+5
2.x=28
x=28:2
x=14
\(720:\left[41-\left(2.x-5\right)\right]=40\) \(\Leftrightarrow41-\left(2x-5\right)=720:40\) \(\Leftrightarrow41-\left(2x-5\right)=18\) \(\Leftrightarrow2x-5=41-18\) \(\Leftrightarrow2x-5=23\) \(\Leftrightarrow2x=23+5\) \(\Leftrightarrow2x=28\) \(\Leftrightarrow x=28:2\) \(\Leftrightarrow x=14\)
