Bài làm
\(\left|x+3\right|=15\Rightarrow\orbr{\begin{cases}x+3=15\\x+3=-15\end{cases}\Rightarrow\orbr{\begin{cases}x=12\\x=-18\end{cases}}}\)
Vậy x = {12; -18}
\(\left|x-7\right|+13=13\Rightarrow\left|x-7\right|=0\Rightarrow x-7=0\Rightarrow x=7\)
Vậy x = 7
\(\left|x-3\right|-16=-4\Rightarrow\left|x-3\right|=12\Rightarrow\orbr{\begin{cases}x-3=12\\x-3=-12\end{cases}\Rightarrow\orbr{\begin{cases}x=15\\x=-9\end{cases}}}\)
Vậy x = {15; -9}
\(26-\left|x+9\right|=-13\Rightarrow\left|x+9\right|=39\Rightarrow\orbr{\begin{cases}x+9=39\\x+9=-39\end{cases}\Rightarrow\orbr{\begin{cases}x=30\\x=-48\end{cases}}}\)
Vậy x = {3-; -48}