x+3/(x+6)(x+4) + 5/4-x=x+2/3-x

this is what I have done so far...

I know to put a negative 1 from the 4-x and the 3-x in order to get -1(x-4) and -1(x-3)

Now I have-1(x+3)(x-3)this is where I am stuck at..if someone could

(x+6)(x-4)

please walk me through this step by step, I would greatly appreciate it.