tim x biet:
2x²-1=17
tim x thuoc Z biet
a) 17-(2x-11) = 12-3x
b) /2x-3/ = 7
c) (2x-1)^4 = 16
d) (17-2x )^3=-125
a) 17-(2x-11) = 12-3x
2x-11 = 17-12+3x
2x-11 = 5+3x
2x-3x = 5+11
-x = 16
x = -16
b, |2x-3|=7
=>2x-3=7 hoặc 2x-3=-7
=>2x=10 hoặc 2x=-4
=>x=5 hoặc x=-2
c, (2x-1)4 = 16
(2x-1)4 = 24
2x-1=2
2x=3
x=3/2
d, (17-2x)3 = -125
(17-2x)3 = (-5)3
17-2x=-5
2x=17-(-5)
2x=22
x=11
a, => 17-2x+11 = 12-3x
=> 28-2x=12-3x
=> 28=12-3x+2x = 12-x
=> x=12-28 = -16
b, => 2x-3=7 hoặc 2x-3=-7
=> x=5 hoặc x=-2
c, => 2x-1=2 hoặc 2x-1=-2
=> x=3/2 hoặc x=-1.2
d, => 17-2x=-5
=> 2x=17-(-5) = 22
=> x=22:2 = 11
Tk mk nha
bai 1)tim x biet
a )24-(36+5)=x
b)14-21=(13-x)-(15+8)
bai 2) tim x biet
a)17-x=-25+(-16+9)
b)3x-21=-19-(-2x)
Bài 1: Tìm x, biết
a )24-(36+5)=x b)14-21=(13-x)-(15+8)
24-41=x (13-x)-23=-7
x=-17 13-x=(-7)+23
Vậy x=-17 13-x=16
x=13-16
x=-3 Vậy x=-3
Bài 2:Tìm x, biết
a)17-x=-25+(-16+9) b)3x-21=-19-(-2x)
17-x=-25+(-7) 3x-21=-19+2x
17-x=-32 3x-2x=-19+21
x=17-(-32) x=4
x=49 Vậy x=4
Vậy x=49
Bài 1:
a. 24 - (36+5) = x
=> 24 - 41 = x
=> -17 = x
=> x = -17
b. 14 - 21 = (13 - x) - (15 + 8)
=> -7 = 13 - x - 23
=> -7 - 13 + 23 = -x
=> 3 = -x
=> x = -3
Bài 2:
a. 17 - x = -25 + (-16 + 9)
=> 17 - x = -25 + (-7)
=> 17 - x = -32
=> 17 + 32 = x
=> x = 49
b. 3x - 21 = -19 - (-2x)
=> 3x - 21 = -19 + 2x
=> 3x - 2x = -19 + 21
=> x = 2
Bài1
a)24-(36+5)=x\(\Rightarrow\)x=24-41=-17
b)14-21=(13-x)-(15+8)\(\Rightarrow\)(13-x)-(15+8)=-7\(\Rightarrow\)13-x=-7+23=16\(\Rightarrow\)x=13-16=-3
Bài2
a)17-x=-25+(-16+9)\(\Rightarrow\)17-x=-25+-7\(\Rightarrow\)17-x=-32\(\Rightarrow\)x=17-(-32)=17+32=49
b)3x-21=-19-(-2x)\(\Rightarrow\)3x-(-2x)=-19-21\(\Rightarrow\)3x+2x=-40\(\Rightarrow\)5x=-40\(\Rightarrow\)x=-8
tim x biet 3(x-5)-2(2x-3)+ 3(6-x)=17
\(3\left(x-5\right)-2\left(2x-3\right)+3\left(6-x\right)=17\)
\(\Rightarrow3x-15-4x+6+18-3x=17\)
\(\Rightarrow-4x=8\)
\(\Rightarrow x=-2\)
Vậy x = -2
tim x biet 3(x-5)-2(2x-3) 3(6-x)=17
tim so nguyen x biet x-(-25-17-2x)=6+x
=>x+25+17+2x=6+x
=>3x+42=6+x
=>3x-x=6-42
=>2x=-36
=>x=-18
Tim x biet
x-(-25-17-2x)=6+x
45-/-27-(-25)-x/=7+27
Tim so nguyen x biet
c) x - (-24) = 3
d) 17 - { - 2x - [-x - (-x)]} = -15
tim STN x biet
a, 21 thuoc B(x-3)
b, 1-x thuoc U(17)
c, 2x+3 thuoc B(2x-1)
d, x+1 thuoc U(x mu 2+x+3)
e, 3x+1:11-2x
a: \(\Leftrightarrow x-3\inƯ\left(21\right)\)
\(\Leftrightarrow x-3\in\left\{-3;-1;1;3;7;21\right\}\)
hay \(x\in\left\{0;2;4;6;10;24\right\}\)
b: \(\Leftrightarrow x-1\in\left\{1;-1;17\right\}\)
hay \(x\in\left\{2;0;18\right\}\)
c: \(\Leftrightarrow2x-1+4⋮2x-1\)
\(\Leftrightarrow2x-1\in\left\{1;-1\right\}\)
hay \(x\in\left\{1;0\right\}\)
d: \(\Leftrightarrow x^2+x+3⋮x+1\)
\(\Leftrightarrow x+1\inƯ\left(3\right)\)
\(\Leftrightarrow x+1\in\left\{1;3\right\}\)
hay \(x\in\left\{0;2\right\}\)
giup mik voi tim x biet
1, 5-(3x+6)>-2x+1
2, -7.(x+2)-3x<6-11x
3, (x+1).(x+2)-x.(x+3)<4-x
4, 6-2x>17+(4-x)