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3x+17=12
=>3x=12-17
=>3x=-5
=>x=-5:3
=>x=-1,66
/x-1/=0
=>x-1=0
=>x =0+1
=>x =1
-13./x/=-26
=>/x/=-26:(-13)
=>/x/=2
=>x=-2 hoặc x=2
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|x-1|=0
\(\Rightarrow\)x-1=0
x=0+1
x=1
Vậy x=1.
-13.|x|=26
|x|=-2
Mà |x|\(\ge\)0
\(\Rightarrow x\in\varnothing\)
Vậy \(x\in\varnothing\)
Chúc bạn học tốt!
#Huyền#
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a) \(\left|x-1\right|=0\)
<=>\(x-1=0\)<=> \(x=1\)
vậy \(x=1\)
b) \(-13.\left|x\right|=-26\)
<=> \(\left|x\right|=2\)=> \(x=\pm2\)
vậy \(x=\pm2\)
c) \(-16+23+x=-16\)
<=> \(7+x=-16\)
<=>\(x=-23\)
vậy \(x=-23\)
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a.17-(-x(-x(-x)))=16
17+x-x+x=16
17+x=16
x=16-17
x=-1
b.26-|x+19|=-13
|x+19|=26--13
|x+19|=26+13
|x+19|=39
\(\Rightarrow\)\(\orbr{\begin{cases}x+19=39\\x+19=-39\end{cases}}\)
\(\Rightarrow\)\(\orbr{\begin{cases}x=20\\x=-58\end{cases}}\)
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-16 + 23 + x = -16
7 + x = -16
x = -16 - 7
x = -23
2x + 35 = -15
2x = -15 - 35
2x = -50
x = -25
-13 x |x | = -26
x = -26 : (-13)
x = 2
Vậy x = 2 hoặc -2
|2x - 5| = 13
2x = 13 + 5
2x = 18
x = 9
(x - 3) x (x + 2) = 0
\(\Leftrightarrow\orbr{\begin{cases}x-3=0\\x+2=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=3\\x=-2\end{cases}}\)
2)2x+35=-15
2x =-15-35
2x = -50
x =-25
1)-16+23+x=-16
7+x =-16
x =-16-7
x =-23
3)-13 * lxl =-26
lxl = -26:-13
lxl =2
<=>x=-2 hoac x=2
5) (x-3).(x+2) =0
<=>\(\orbr{\begin{cases}x-3=0\\x+2=0\end{cases}}\) <=>\(\orbr{\begin{cases}x=3\\x=-2\end{cases}}\)
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a, ( x + 1 ) + ( x + 2 ) + ... + ( x + 199 ) = 0
x + 1 + x + 2 + ... + x + 199 = 0
( x + x + ... + x ) + ( 1 + 2 + ... + 199 ) = 0
199x + 19900 = 0
199x = 0 - 19900
199x = -19900
x = -19900 : 199
x = -100
Vậy ...
b, ( x - 30 ) + ( x - 29 ) + ( x - 28 ) = 11
x - 30 + x - 29 + x - 28 = 11
( x + x + x ) - ( 30 + 29 + 28 ) = 11
3x - 87 = 11
3x = 11 + 87
3x = 98
x = \(\frac{98}{3}\)
Vậy ...
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a)x=-23
b)x=25
c)x=-5/3
d)x=1
e)x=2 hoac x=-2
tk minh nha
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a)-16+23+x=-16
7+x=-16
x=-16-7
x=-23
b)2.x-35=15
2.x=15+35
2.x=50
x=50:2
x=25
c)3.x+17=12
3.x=12-17
3.x=-5
x=-5:3
x=-1,(6)
d)Ix-1I=0
IxI=0+1
IxI=1
=>x=1 hoặc x=-1
e)-13.IxI=-26
IxI=-26:(-13)
IxI=2
=>x=2 hoặc x=-2
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1) |x-1| = 0 ( vì số 0 không phải là số nguyên âm cũng không phải là số nguyên dương nên không có 2 trường hợp xảy ra nhé)
x = 0+1
x = 1
2) -13.|x| = -26
|x| = -26 : -13
|x| = 2
x = -2; 2
|x-1|=0
x-1=0
x=0+1
x=1
Vậy x=1
-13.|x|=-26
|x|=-26:(-13)
|x|=2
=> x=+2
Vậy x=+2
lx-1l=0 => x=1
-13.lxl=-26 => x=2 hoặc -2