# How do you simplify -2[9 - (x + 7)]?

Oct 5, 2016

$2 x - 4$

#### Explanation:

Begin by distributing the bracket which is inside the 'square bracket'
That is.

$- 2 \left[9 - x - 7\right]$

and simplifying to obtain.

$- 2 \left(- x + 2\right)$

distribute to obtain simplification.

$\Rightarrow - 2 \left(- x + 2\right) = 2 x - 4$