I think I might have gotten the answer to these but I don't know....

(9x^2-3x)/3x

answer

3x-1

^^^^^^^^^^^

(x^2-5x+4/x-1

answer

x-4

^^^^^^^^^^^^^^^^

(x-y)/(x+y)+((x+y)/(x-y)

answer

(x-y)+(x+y)

^^^^^^^^^^^^^^^^

One last thing I'm unsure of is a question that asks me to solve an equation. I have the answer, I used logic to find it and now I can't figure out how to show working for it.

1/x-1/(4-x)=1/3

x=2