# How do you solve x = y - 8 & -x - y = 0?

$x = - 4$
$y = 4$

#### Explanation:

$y = x + 8$ (1)
$y = - x$ (2)

Subtracting (1) - (2):

$0 = 2 x + 8$

$2 x = - 8$

$x = - \frac{8}{2} = - 4$

$y = - \left(- 4\right) = 4$