#### Answer

a solution

#### Work Step by Step

Substituting $x=
8$ to the given equation, $
6-x=-2
$, then
\begin{array}{l}
6-8=-2
\\\\
-2=-2
\text{ (TRUE)}
.\end{array}
Since the solution above ended with a $\text{
TRUE
}$ statement, then the given value of the variable is $\text{
a solution
}$ to the given equation.