720 : [41 – (2x – 5)] = 22.5
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720 : [ 41 - (2\(x\) - 5)] = 22.5
41 - (2\(x\) - 5) = 720 :110
2\(x\) - 5 = 41 - \(\dfrac{72}{11}\)
2\(x\) - 5 = \(\dfrac{379}{11}\)
2\(x\) = \(\dfrac{379}{11}\) + 5
2\(x\) = \(\dfrac{434}{11}\)
\(x\) = \(\dfrac{434}{11}\) : 2
\(x\) = \(\dfrac{217}{11}\)
15 - \(x\) = 7 - (-2)
15 - \(x\) = 7 + 2
15 - \(x\) = 9
\(x\) = 15 - 9
\(x\) = 6
128 - 3 ( x + 4 ) = 23
3 ( x + 4 ) = 128 - 23
3 ( x + 4 ) = 105
x + 4 = 105 : 5
x + 4 = 35
x = 35 - 4
x = 31
128 - 3 ( x + 4 ) = 23
3 ( x + 4 ) = 128 - 23
3 ( x + 4 ) = 105
x + 4 = 105 : 5
x + 4 = 35
x = 35 - 4
x = 31
k mik nha
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
\(720:\left[41-\left(2x-5\right)\right]=2^3\cdot5\)
\(\Rightarrow720:\left(41-2x+5\right)=8\cdot5\)
\(\Rightarrow720:\left(46-2x\right)=40\)
\(\Rightarrow46-2x=720:40\)
\(\Rightarrow46-2x=18\)
\(\Rightarrow2x=46-18\)
\(\Rightarrow2x=28\)
\(\Rightarrow x=28:2\)
\(\Rightarrow x=14\)
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
720 : [ 41 - (2x - 5) ] = 8 . 5
x=14
đảm bảo đúng 100% nếu sai cứ bảo mình
k mình nha^_^
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 : [41 - (2\(x\) - 5)] = 22.5
720 : [41- (2\(x-5\))] = 4.5
720 : [41 - (2\(x\) - 5)] = 20
41 - (2\(x\) - 5) = 720 : 20
41 - (2\(x-5\)) = 36
2\(x\) - 5 = 41 - 36
2\(x\) - 5 = 5
2\(x\) = 5 + 5
2\(x\) = 10
\(x\) = 10 : 2
\(x\) = 5
Vậy \(x\) = 5
\(720:\left[41-\left(2x-5\right)\right]=2^2.5\)
\(720:\left[41-\left(2x-5\right)\right]=4.5\)
\(720:\left[41-\left(2x-5\right)\right]=20\)
\(41-\left(2x-5\right)=720:20\)
\(41-\left(2x-5\right)=36\)
\(2x-5=41-36\)
\(2x-5=5\)
\(2x=5+5\)
\(2x=10\)
\(x=10:2\)
\(x=5\)