How do you simplify -y + 9z -16y - 25z?

May 25, 2018

$- 17 y - 16 z$

Explanation:

To simplify this, we have to combine like terms. First, let's color code the like terms:
$\textcolor{red}{- \quad y} \quad \textcolor{b l u e}{+ \quad 9 z} \quad \textcolor{red}{- \quad 16 y} \quad \textcolor{b l u e}{- \quad 25 z}$

Now combine like terms:
$- 17 y - 16 z$

Hope this helps!