Answer:
(4x+7)/(x^2-x-20)
Step-by-step explanation:
To simplify them into one, you need to make the common denominator (x+4)(x-5).
[1(x-5)+3(x+4)]/(x-5)(x+4)
(x-5+3x+12)/(x-5)(x+4)
(4x+7)/(x-5)(x+4)
I'm not sure how simplified you want it, but as I put at the top, the (x-5)(x+4) can be simplified to x^2-x-20
