Hi there,
I hope you and your family are staying safe and healthy!
[tex]-9 (y-13) = 16[/tex]
This is called a linear equation. Let's distribute:
[tex]-9y + 117 = 16[/tex]
Now we need to subtract 117 from both sides
[tex]-9y +117-117=16-117[/tex]
[tex]-9y = -101[/tex]
Now divide both sides by -9
[tex]\frac{-9y}{-9} = \frac{-101}{-9}[/tex]
[tex]y = \frac{101}{9}[/tex]
Happy to help! All the best this semester!