X +5 x 2-(32+15 x 3:9-15)=0
|x+3|+|-x-3|=20
-(-1-x)+(-x)^3+x(x^2-2)=-30
2*x*x*x+3*(-x)^2*x+4*(-x)^3-5*(-x)=-10
x^2(x-2)-16x+32=0
|x+3|=|2x-9|
(2x+9)^2=(x+15)^2
|x-15|-|2x+6|=0
Tìm x :
a, -32 - ( x-5 ) = 0
b, -2x + ( 5 - 9 ) = 0
c, 11 + 3 +( 15 - x ) = 16
a) \(-32-\left(x-5\right)=0\)
\(-32-x+5=0\)
\(\Rightarrow-32-x=-5\)
\(\Rightarrow x=\left(-32\right)-\left(-5\right)\)
\(x=\left(-32\right)+5\)
\(\Rightarrow x=\left(-27\right)\)
b) \(-2x+\left(5-9\right)=0\)
\(-2x+5+9=0\)
\(-2x+14=0\)
\(\Rightarrow-2x=\left(-14\right)\)
\(\Rightarrow x=\dfrac{-14}{-2}=7\)
c) \(11+3+\left(15-x\right)=16\)
\(14+15+x=16\)
\(29+x=16\)
\(x=16-29\)
\(\Rightarrow x=\left(-13\right)\)
bài 2 tìm x
1 ( x - 17 ) * 17 = 0
2 32 ( x - 11 ) = 32
3 ( x - 25 ) - 75 = 0
4 575 -( 6 * x + 70 ) = 445
5 315 + ( 125 - x ) = 435
6 x- 105 : 21 = 15
7 ( x - 105 ) : 21 = 15
8 ( x - 38 ) : 19 = 12
9 ( x - 15 ) * ( x - 19 ) = 0
10 96 - 3 ( x + 1 ) = 42
1) (x-17)*17=0
x-17=0
x=17
2) 32(x-11)=32
x-11=1
x=12
3) (x-25)-75=0
x-25=75
x=3
4) 575-(6*x+70)=445
6*x+70=130
6*x=60
x=10
5) 315+(125-x)=435
125-x=120
x=5
6) x-105:21=15
x-5=15
x=20
7) (x-105):21=15
x-105=315
x=420
8) (x-38):19=12
x-38=228
x=266
9) (x-15)*(x-19)=0
=>x-15=0 hoặc x-19=0
x=15 hoặc x=19
10) 96-3(x+1)=42
3(x+1)=54
x+1=18
x=17
a) ( x - 17 ) . 17 = 0
=> x - 17 = 0 : 17
=> x - 17 = 0
=> x = 0 + 17
=> x = 17
b) 32 . ( x - 11 ) = 32
=> x - 11 = 32 : 32
=> x - 11 = 1
=> x = 1 + 11
=> x = 12
c) ( x - 25 ) - 75 = 0
=> x - 25 = 0 + 75
=> x - 25 = 75
=> x = 75 + 25
=> x = 100
d) 575 - ( 6 . x + 70 ) = 445
=> 6 . x + 70 = 575 - 445
=> 6 . x + 70 = 130
=> 6 . x = 130 - 70
=> 6 . x = 60
=> x = 60 : 6
=> x = 10
e) 315 + ( 125 - x ) = 435
=> 125 - x = 435 - 315
=> 125 - x = 120
=> x = 125 - 120
=> x = 5
f) x - 105 : 21 = 15
=> x - 5 = 15
=> x = 15 + 5
=> x = 20
g) ( x - 105 ) : 21 = 15
=> x -105 = 15 . 21
=> x - 105 = 315
=> x = 315 + 105
=> x = 420
h) ( x - 38 ) : 19 = 12
=> x - 38 = 12 . 19
=> x - 38 = 228
=> x = 228 + 38
=> x = 266
i) ( x - 15 ) . ( x - 19 ) = 0
=> x - 15 = 0 => x = 0 + 15 => x = 15
x - 19 = 0 => x = 0 + 19 = x = 19
=> x = 15 ; 19
j) 96 - 3( x + 1 ) = 42
=> 3( x + 1 ) = 96 - 42
=> 3( x + 1 ) = 54
=> x + 1 = 54 : 3
=> x + 1 = 18
=> x = 18 - 1
=> x = 17
x^15 = x^12
( x-1 )^5 = ( x-1 )^3
4.120+ [ 45: 9 +15( x+1) ] = 500
[( 46-32)^2 - ( 54-42)^2]. 2.x- 1872=0
mọi người ơi, mình đang cần gấp! help, ai nhanh nhất mik tick cho
Bài tập: Tìm x, biết:
a, 2x - (-17) = 15
b, 3x - 2 + 15 = 21 + 1
c, 4 . (x - 2) + 16 = -32
d, 2 . /x + 5/ = 10
e, (x2 + 1) . (3x - 9) = 0
g, x - 3 = 3x + 9
a,2x-(-17)=15
2x+17=15
2x=15-17
2x=-2
=>x=-1
a, 2x -(-17) = 15
2x + 17 = 15
2x = 15 - 17
2x =(-2)
x = (-2) : 2
x = (-1)
Tìm x eN biết
a) (x –15) .15 = 0 b) 32 (x –10 ) = 32 c/ ( x – 5)(x – 7) = 0 d/ (x – 35).35 = 3
Bài 1: Thực hiện phép tính.
A) 3: ( -1/2 )2 + 1/9 x Căn 36
B) 81 x ( 1/3)3 + 1/3
C) Căn 12 + Căn 27 - Căn 3
D) -32 - ( 1/2)-2 : 2 + (2/3)0 : (3/4)-1
E) 3/4 - ( -1/2 )2
F) 15/16 : (-2 2/3) + 15/16 : ( -1 3/5 )
G) 3/5 + -1/4 + 3/20
H) 3: ( -3/2)2 + 1/9 x căn 36
I) 272 x 85/ 66 x 323
J) (0.8)5/ (0.4)6
K) 272/ 242
L) (0.125)3 x 83
M) (-39)4 : 134
N) (0.6)5/ (0.2)6
O) ( 3/7 + 1/2 )2
P) 2:(1/2 - 2/3 )2
Q) 9x (-1/3)3 + 1/3
c: \(=2\sqrt{3}+3\sqrt{3}-\sqrt{3}=4\sqrt{3}\)
Tìm x
a, [ x - 15 ] . 15 = 0
b, 32 . [ x - 10 ] = 32
c, [ x - 15 ] - 75 = 0
d, 575 - [ 6x + 70 ] = 445
e, 315 + [ 125 - x ] = 435
f, 541 + [ 218 - x ] = 735
g, [ x - 36 ] : 18 = 2
h, 70 - 5 . [ 2x - 3 ] = 45
k, [ 2x - 39 ] . 7 + 3 = 80
m, [ x - 5 ] . [ x - 8 ] = 0
575- [6x+70] = 445 315 +[125-x] = 435 f 541+[218-x]=435
6x+70 =575-445 125-x = 435- 315 218-x = 541-435
6x+70 = 130 125-x =120 218-x =106
6x = 130-70 x = 125 - 120 x = 218-106
6x = 60 x = 5 x = 112
x = 60:6
x = 10
bạn ơi khó hiểu quá,.,.,.
\(\orbr{\begin{cases}\\\end{cases}}\)
De ma ban oi dau can phai dua len mang
(x –15) .15 = 0 b) 32 (x –10 ) = 32
c) ( x – 5)(x – 7) = 0 d) (x – 35).35 = 35
c)(x-5)(x-7)=0
x=5 hoặc x=7
Vậy \(x\in\left\{5;7\right\}\)