![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 27+(-17+x)=297-(12+297)
27-17+x=297-12-297
10+x=-12
x=-22
b,25-(-2+x+25)= -(-10-397)+(-397-5)
25+2-x-25=10+397-397-5
2-x=5
x=-3
c, (32-x)+(-7+/x/)-(/-x/+25)=-45
* TH1: x>=0, ta có /x/=x , /-x/=-x
32-x+(-7+x)-(-x+25)=-45
32-x-7+x+x-25=-45
x=-45
*TH2:x<0, ta có /x/=-x, /-x/=x
32-x-7-x-x-25=-45
-3x=-45
x=15
![](https://rs.olm.vn/images/avt/0.png?1311)
=> (32-x)+(-7+x)-(x+23)=-45
=> 32-x-7+x-x-25=-45
=>-x=-45
=>x=45
Ta có :\(\left(32-x\right)+\left(-7+\left|x\right|\right)-\left(\left|-x\right|+25\right)=-45\)
\(\implies\)\(32-x-7+\left|x\right|-\left|-x\right|-25=-45\)
\(\implies\) \(32-x-7+\left|x\right|-\left|x\right|-25=-45\)
\(\implies\) \(32-x-7-25=-45\)
\(\implies\) \(\left(32-7-25\right)-x=-45\)
\(\implies\) \(0-x=-45\)
\(\implies\) \(x=0-\left(-45\right)\)
\(\implies\) \(x=0+45\)
\(\implies\) \(x=45\)
( 32 - x ) + ( -7 + |x| ) - ( |-x| + 25 ) = -45
( 32 - x ) + ( -7 + |x| ) = -45 + ( |-x| + 25 )
( 32 - x ) + ( -7 + |x| ) = -45 + 25 + |-x|
( 32 - x ) + ( -7 + |x| ) = -20 + |-x|
( 32 - x ) = -20 + |-x| - ( -7 ) + |x|
( 32 - x ) = -20 + 7 + |-x| + |x|
( 32 - x ) = -13 + x + x
( 32 - x ) = -13 + 2x
32 - x = -13 + 2x
-2x + ( -x ) = -13 -32
-3x = -45
3x = 45
x = 45 : 3 = 15