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

$7n-8$
Since the grouping symbol is preceded by a negative sign, then the sign of each term inside the grouping symbol alters once the grouping symbol is removed. Hence, the given expression, $-{-7n+8}$, is equivalent to \begin{array}{l}\require{cancel} 7n-8 .\end{array}