# How do you solve -4x-7=21?

Aug 17, 2016

Isolate $x$.

#### Explanation:

To do this, let's add $7$ to each side:

$- 4 x = 28$

Next, let's divide each side by $- 4$:

$\frac{- 4 x}{-} 4 = \frac{28}{-} 4$

$x = - 7$