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X-(-2)=6 -x+23=14-47
x+2=29-x=-33
TH1:x+2=-33
x=-33-2
x=-35
TH2:29-x=-33
x=29-(-33)
x=62
![](https://rs.olm.vn/images/avt/0.png?1311)
a) - 25 + x = - 14
x = - 14 + 25
x = 11
Vậy x = 11
d) 13 + x - 47 = 23
x = 23 + 47 - 13
x = 70 - 13
x = 57
Vậy x = 57
![](https://rs.olm.vn/images/avt/0.png?1311)
a) x - ( - 2 ) = 6
x = 6 + ( - 2 )
x = 4
b) - x + 23 = 14 - 47
- x + 23 = -33
- x = -33 - 23
- x = -56
x = 56
a) x-(-2)=6
x+2=6
x=6-2
x=4
b)-x+23=14-47
-x+23=-33
-x=(-33)-23
-x=-56
x=56
tick cho mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
a, x -(-2) =6
suy ra x + 2 =6
Suy ra x=4
b, -x + 23 = 14 -47
suy ra -x + 23 = -33
Suy ra -x = -56
suy ra x= 56
k nha ooooook
a) x-(-2)=6
x +2=6
x=6-2
x=3
b) -x+23=14-47
-x+23=-33
-x=-33-23
-x=-56
\(\Rightarrow\)x=56
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) x - ( - 2 ) = 6
x = 6 + ( - 2 )
x = 4
b ) -x + 23 = 14 - 47
-x + 23 = - 33
- x = - 33 - 23
- x = - 56
a)x-(-2)=6
x+2=6
x=6-2
x=3
b)-x+23=14-47
-x+23=-33
-x=(-33)-23
-x=-56
=>x=56
tick cho mk nha bạn Trần Ngọc Mai
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) x ∈ ± 23 28 . b ) x ∈ − 23 6 ; 35 6 . c ) x ∈ − 17 60 ; 97 60 . d ) x ∈ 67 140 ; 143 140 .
![](https://rs.olm.vn/images/avt/0.png?1311)
1)
-131-74+(-45)-(131)
=-131 - 74 - 45 - 131
=-381
2)
x-(-14)= -54
x + 14 = -54
x = -54 - 14
x =-68
135-(x-47)=23
x - 47 = 135 - 23
x - 47= 112
x= 112 + 47
x=159
-x+23=14-47
-x+23=-33
-x=-33-23
-x=-56
k nhe dung lun
-x+23=14-47
=> -x+23= -33
=> -x= -33-23
=> -x= -56
=>x= 56