Answer
$s=-104$
Work Step by Step
The given equation is
$\Rightarrow \frac{s}{-8}=13$
Multiply each side by $-8$.
$\Rightarrow -8\cdot (\frac{s}{-8})=-8\cdot13$
Simplify.
$\Rightarrow s=-104$
Check $s=-104$.
$\Rightarrow \frac{-104}{-8}=13$
$\Rightarrow 13=13$
True.
Hence, the solution is $s=-104$.
