How do you combine $\frac{4}{y} + \frac{5}{- y}$ $4/y+5/-y$ ?

Question

1528 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-07-11T13:46:16

$\frac{1}{- y}$ $1/-y$

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

$\frac{4 \times - 1}{y \times - 1} + \frac{5}{- y}$ $(4times-1)/(ytimes-1) + 5/-y$

$\frac{- 4}{- y} + \frac{5}{- y}$ $(-4)/-y + 5/-y$

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

$\frac{- 4 + 5}{- y}$ $(-4+5)/-y$

$\frac{1}{- y}$ $1/-y$

And that's our simplified answer!

How do you combine 4/y+5/-y4y+5−y4/y+5/-y?