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![](https://rs.olm.vn/images/avt/0.png?1311)
11- (x+84) = 97
=> 11 -x - 84 = 97
=> 11-x = 181
=> x= 11- 181
=> x= -170
cấc câu sau làm tương tự
![](https://rs.olm.vn/images/avt/0.png?1311)
- ( x + 84 ) + 213 = 16 - 213
- ( x + 84 ) = - 229
=> x + 84 = 229
x = 145
![](https://rs.olm.vn/images/avt/0.png?1311)
\(-\left(x+84\right)+213=-16\)
\(-x-84+213=-16\)
\(-x-84=-16-213\)
\(-x-84=-229\)
\(-x=-229+84\)
\(-x=-145\)
\(x=145\)
Vậy x=145
![](https://rs.olm.vn/images/avt/0.png?1311)
Nếu ko thì:
-(x + 84) + 213 = -16
-(x + 84) = (-16) - 213
-(x + 84) = -197
-x + -84 = -197
-x = (-197) - (-84)
-x = -113
Vậy x=113
![](https://rs.olm.vn/images/avt/0.png?1311)
\(-\left(x+84\right)+213=-16\)
\(-x-84+213=-16\)
\(-x+129=-16\)
\(x=129+16\)
\(x=145\)
![](https://rs.olm.vn/images/avt/0.png?1311)
- ( x + 84 ) + 213 = -16
- ( x + 84) = -16-213
- ( x + 84 )=-229
- x -84 = -229
-x =-229 + 84
-x =-145
Vậy x = 145
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :
\(-\left(x-84\right)+213=16\)
\(-\left(x-84\right)=16-213\)
\(-\left(x-84\right)=-197\)
\(=>x-84=197\)
\(x=197+84\)
\(x=281\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-(x+84)+213=-16
=>-(x+84)=-16-213=-229
=>x+84=229
=>x=229-84=145
tick nha các pn
=> 213 + (x + 84).(-2 + 1) = 0
=> 213 - (x + 84) = 0
=> 213 - x - 84 = 0
=> 129 - x = 0
=> x = 129