720 : [41-(2x-5) ] =8 x5
720 : [ 41 - (2x - 5) ] = 8 . 5
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-(2x-5)]=40
=>[41-(2x-5)]=18
=>(2x-5)=41-18
=>(2x-5)=33
=>2x=33+5
=>2x=38
=>x=19
tim x
a, ( 2x - 4 ) ^ 3 = 8
b, 720 / [ 41 - ( 2x - 5 ) ] = 2^3 * 5
(2x - 4)3 = 8
(2x - 4)3 = 23
2x - 4 = 2
2x = 2 + 4
2x = 6
x = 6 : 2
x = 3
\(\frac{720}{41-\left(2x-5\right)}=2^3\times5\)
\(\frac{720}{41-2x+5}=8\times5\)
\(46-2x=\frac{720}{40}\)
\(2x=46-18\)
2x = 28
x = 28 : 2
x = 14
Tìm số tự nhiên x biết
a) 720 : [41-(2x -5) ]= 23 x5
b) (7x -11 )3 =25 x 52 +200
2x vs 7x là hai nhân x và bảy nhân x
CÁC BẠN GIÚP MÌNH VỚI !!!!!!!!!!!!!!!
(12x-43).83=4.84
720:[41-(2x-5)]=23.5
(12x-43).83=4.84
=> 12x-43=4.84:83
=> 12x-64=4.8
=> 12x-64=32
=> 12x=32+64
=> 12x=96
=> x=8
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=23+5
=> 2x=28
=> x=14
720÷[41-(2x+5)]=2²×5
\(\Leftrightarrow36-2x=36\)
=>x=0
720÷[41-(2x+5)]=2³×5
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
a) (2x -4)3 = 8 b) 720 : [41 -(2x-5)]=23. 5
\(\left(2x-4\right)^3=8=2^3\)
\(2x-4=2\)
\(2x=6\)
\(x=3\)
a) (2x -4)3 =23 b)
=>2x -4 =2
2x =6
x =3
a) ( 2x - 4 )3 = 8
=>( 2x - 4 )3 = 23
=> 2x - 4 = 2
=> 2x = 6
=> x = 3
b) 720 : [ 41 - ( 2x - 5 ) ] = 23 . 5
=> 720 : [ 41 - ( 2x - 5 ) ] = 40
=> 41 - ( 2x - 5 ) = 18
=> 2x - 5 = 23
=> 2x = 28
=> x = 14
720 : [ 41 - ( 2x - 5 ) = 2^2 . 5
\(\Leftrightarrow41-2x+5=720:20=36\)
=>-2x=0
hay x=0
d) 720:[41-(2x-5)]=2³.5
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.`