(5c-8d/3c) - (2c-10d/3c)

Not quite Jay Cole

First I am goingto put brackets around 3c because I think that is what you really want - 

I am mindreading I appologise if I get it wrong

(5c-8d/[3c]) - (2c-10d/[3c])

$$\\(5c-\frac{8d}{3c}) - (2c-\frac{10d}{3c})\\\\ =5c-\frac{8d}{3c} -1 (2c-\frac{10d}{3c})\\\\ =5c-\frac{8d}{3c} -2c+\frac{10d}{3c}\\\\ =5c-2c-\frac{8d}{3c} +\frac{10d}{3c}\\\\ =3c+\frac{-8d+10d}{3c}\\\\ =3c+\frac{2d}{3c}\\\\$$

 ud get 3c-18d/3c. since the stuff on the buttom is the same u just have to deal with the stuff on top. i forget which ones the numberator and which ones the denomenator.