\(x-\left|11-x\right|=-48+\left(-12+x\right)\)
- Với \(11-x\ge0\Leftrightarrow x\le11\):
\(x-\left|11-x\right|=-48+\left(-12+x\right)\)
\(\Leftrightarrow x-\left(11-x\right)=-48+\left(-12+x\right)\)
\(\Leftrightarrow x=-48-12+11+-49\)(tm)
- Với \(11-x< 0\Leftrightarrow x>11\):
\(x-\left|11-x\right|=-48+\left(-12+x\right)\)
\(\Leftrightarrow x-\left(x-11\right)=-48-12+x\)
\(\Leftrightarrow x=-48-12-11=-71\)(loại)