(x-1)+10=7
x-1 =10-7
x-1 =3
=> x =3+1
=> x =4
(x+2)-6=10
x+2 =10+6
x+2 =16
=>x =16-2
=>x =14
a) \(\left(x-1\right)+10=7\)
\(\Leftrightarrow x-1=7-10\)
\(\Leftrightarrow x-1=-3\)
\(\Leftrightarrow x=-3+1\)
\(\Leftrightarrow x=-\left(3-1\right)\)
\(\Leftrightarrow x=-2\)
Vậy x=-2
b) \(\left(x+2\right)-6=10\)
\(\Leftrightarrow x+2=10+6\)
\(\Leftrightarrow x+2=16\)
\(\Leftrightarrow x=16-2\)
\(\Leftrightarrow x=14\)
Vậy x=14