3,628,800 is the correct answer
To start, first distribute 8 to (y+11) which would look something like this:
9y=8y+88
Now, subtract 8y from both sides in order to solve for and isolate the y value. This would result in your answer, y=88.
Answer:
You increase each term inside the parentheses by -1 in order to subtract each term, since the subtraction is the additive inverse