Answer:
-1y + 6
Step-by-step explanation:
To simplify this problem, all we'd need to do is just combine like terms. In this case, your like terms are 7y and -8y & 12 and -6. So just combine those terms and you have your answer.
7y - 8y = -1y
12 - 6 = 6
So what you have left is -1y + 6. Hope this helped!
-Kirito