Hi there! ~
To start off our equation we have (as listed in the question)

First we need to simplify, and to do so we are going to replace y with -1 as shown here;

Now we subtract 5 from both sides.

Now our next, and final step is to multiply both of our given sides by;


Leaving us with our final answer of
y = -40.Therefore, D.
~ Littlebird17