Answer
$18$ is a solution
Work Step by Step
Substituting $x=18$ in the given equation, $
16=2(x-1)-x
,$ results to
\begin{array}{l}\require{cancel}
16=2(18-1)-18
\\
16=2(17)-18
\\
16=34-18
\\
16=16
\text{ (TRUE)}
.\end{array}
Since the substitution above ended with a TRUE statement, then $x=18$ is a solution.
