Answer:
y = 9
Explanation:
I think you might have written this problem wrong, but I think the question is asking me to find y in the equation:

Lets start by subtracting 6 from both sides:

Simplify:

Multiply both sides by -1

Simplify(cancel duplicate negatives)

Divide both sides by 2

Simplify(remove denominator)

Therfore, y = 9
I hope this helped!
~~~Harsha~~~