# How do you solve the equation:  x + 13 = -8?

Jul 23, 2015

Subtract $13$ from both sides to isolate $x$
$\textcolor{w h i t e}{\text{XXXX}}$$x = - 21$

#### Explanation:

If $x + 13 = - 8$
then
$\textcolor{w h i t e}{\text{XXXX}}$$\left(x + 13\right) - 13 = \left(- 8\right) - 13$

$\textcolor{w h i t e}{\text{XXXX}}$$x + \left(13 - 13\right) = - \left(8 + 13\right)$

$\textcolor{w h i t e}{\text{XXXX}}$$x = - 21$