step one, factor the denominators:
5x/(x-1)(x-6)-3(x+2)/(x+2)(x-6)
step two: make the denominators the same, the first fraction multiple (x+2), both top and bottom, the second one multiply (x-1), both top and bottom
simplify, I eventually get the answer (2x+3)/(x^2-7x+6)
