# How do you solve sqrt(a-5)<=4?

Nov 23, 2016

$a \le 21$

#### Explanation:

Square both sides to begin isolating $a$.

$a - 5 \le {4}^{2}$

Now add $5$ to both sides.

$a \le 16 + 5$

Combine like terms.

$a \le 21$

There you go!