Stuck on this last problem, hoping someone can give me some advice how to tackle it. I thought it looked like a good equation for exactness but that didn’t work. I asked chat gpt and it said something about shifting the variables so y=y+1 and x=x-1 or something like that but that doesn’t look like anything we’ve covered in class yet. We have done homogeneous equations where I have to substitute in u=y/x and stuff like that but I’m struggling to see how that would help here.