Answer
$n=-17$
Work Step by Step
Distributing the constants on both sides gives,
$16n-40 = 18n-6$
Then we move all the variables to one side and constants to another,
Add 6-16n to both sides,
$16n-40+ 6-16n = 18n-6+ 6-16n$
Simplifying,
$-34=2n$
$n=-17$
Plugging it back in yields,
$8*-39= 3*-102$ which is true.
