F=ma
a=g= 11.15
m=68
answer will be in N (newtons)
I've written down the working out and the answer on the attached image
The answer to this equation is y = -1/3.
Steps:
y + 8/9 = 5/9
Subtract 8/9 from both sides.
y + 8/9 - 8/9 = 5/9 - 8/9
Then you get your answer, which is y = -1/3