/10+x/=-7+17=10
=> 10+x=10 hoặc 10+x=-10
=> x=0 hoặc x=-20
\(\left|10-x\right|-17=-7\)
\(\Leftrightarrow\left|10-x\right|=-7+17\)
\(\Leftrightarrow\left|10-x\right|=10\)
\(\Leftrightarrow\orbr{\begin{cases}10-x=-10\\10-x=10\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=20\\x=0\end{cases}}\)
Vậy ...
-> | 10-x | = 10
-> 10 - x = 10 hoặc 10 - x = -10
-> x = 0 hoặc x =20
|10-x|-17=-7
|10-x| =(-7)+17
|10-x| =10
=>10-x =10 =>x =0
=>10-x =-10 =>x =20