Intermediate Algebra (6th Edition)

$n = 3, n = -3$
$2$ $+$ $\mid$$5n$$\mid$ $= 17$ $2 + 5n = 17$ $5n = 15$ $n = 3$ $2$ $+$ $\mid$$5n$$\mid$ $= 17$ $2 + -5n = 17$ $-5n = 15$ $n = -3$