\(\left(4x+15\right)^3=27\Rightarrow4x+15=3\Leftrightarrow x=-3\)
(4x + 15)3- 11 = ( - 2 )4
(4x + 15)3 = (-2)4+11
(4x + 15)3 = 27
(4x+15)3 = 33
=> 4x+15 = 3
4x = -12
x = -3
\(\left(4x+15\right)^3=27\Rightarrow4x+15=3\Leftrightarrow x=-3\)
(4x + 15)3- 11 = ( - 2 )4
(4x + 15)3 = (-2)4+11
(4x + 15)3 = 27
(4x+15)3 = 33
=> 4x+15 = 3
4x = -12
x = -3
2/3 +(4/5 x -11/15) = 5/9
(3/4 -3x) nhân (1+4x) =0
(4x + \(_{15}3\)) -11=(-\(2^4\))
các bạn giúp mình với
1. Thực hiện phép tính, tính hợp lý nếu có thể:
a) 4 . 12 + 4 . 88. b) 72 - 6 . [ 2 . ( 5 + 3 ) : 8 ].
2. Tìm x:
a) 11 + x = 26. b) ( 4x - 15 )3 = 125
tìm x
25.3 - 3.(x+1)=42
(4x + 5) : 3 - 112:11=22
3x - 15 . 4 = 6.(19 - x)
(x - 7).(2x - 16)=0
Bài 1:
a)-2x-3.( x-17 )= 34-2.( -x+25 )
b)17x+3.( -16x-37 )= 2x+43-4x
c){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} = 55
g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]
Bài 2:
a)-5.( -x+7 )-3.( -x-5 )=-4.( 12-x )+48
b)7.( -x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
c)-2.( 15-3x )-4.( -7x+8 )=-5-9.( -2x+1 )
d)5.( -3x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
e)4( x-2 )2-13=( -3 )2.2-11.( -3 )
f)-52-( 2x-1 )3=( -13 ).( -3 )
Tìm số tự nhiên x biết:
a) x – 32 : 16 = 48
b) 88 – 3.(7+x) = 64
c) (5+4x) : 3 – 121 : 11 = 4
d) 15 – 2(3x+1) = 11.13 – 130
tìm x
25.3 - 3.(x+1)=42
(4x + 5) : 3 - 112:11=22
3x - 15 . 4 = 6.(19 - x)
(x - 7).(2x - 16)=0
Timf `x`:
`(x - 2)/3 = (x + 1)/4`
`(x - 2) . 4 = (x + 1) . 3`
`<=> 4x - 8 = 3x + 3`
`<=> 4x - 3x = 3 + 8`
`<=> (4 - 3)x = 11`
`=> x = 11`
Tìm x , y biết
a ) x mũ 2 = x mũ 5
b ) ( 3x - 12 )mũ 15 = ( x - 17)mũ 15
c ) ( 4x - 16 )mũ 15 - ( x - 2 )mũ 15 = 0
d ) ( x - 3 )mũ 11 = ( 2x - 6 )mũ 11