# How do you simplify -9(y-7) ?

Jun 5, 2016

Use the distributive property to get $- 9 y + 63$ .

#### Explanation:

The distributive property means the you can change $a \left(b + c\right)$ into $a b + b c$.

In your problem, that means you can multiple $- 9 y$ by each $y$ and $- 7$ and add them together.

$- 9 \cdot y = - 9 y$ and $- 9 \cdot - 7 = 63$

So, the simplified answer is $- 9 y + 63$