Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$-412$
Using the properties of equality, the value of $n$ in the given equation, $n+268=124$, is \begin{array}{l} n+268-268=124-268 \\\\ n=-144 .\end{array} Hence, $n-268$ evaluates to \begin{array}{l} -144-268 \\\\= -412 .\end{array}