Question

How do you combine `4/y+5/-y`?

Answer 1

`1/-y`

Explanation:

First, we need to get common denominators. We can do that by multiplying the first fraction by `-1`.

`(4times-1)/(ytimes-1) + 5/-y`

`(-4)/-y + 5/-y`

Now we have common denominators. We can go ahead and add the fractions.

`(-4+5)/-y`

`1/-y`

And that's our simplified answer!