# Question a50b9

Oct 22, 2016

? = 361

#### Explanation:

We start by distributing the left hand side, letting ? = x#

$12 \sqrt{36} + 3 \sqrt{36} - 8 \sqrt{36} - 2 \sqrt{36} = \sqrt{x} + 11$

$12 \left(6\right) + 3 \left(6\right) - 8 \left(6\right) - 2 \left(6\right) = \sqrt{x} + 11$

$30 = \sqrt{x} + 11$

$30 - 11 = \sqrt{x}$

$19 = \sqrt{x}$

Now, square both sides to get rid of the square root.

${\left(\sqrt{x}\right)}^{2} = {19}^{2}$

$x = 361$

Hopefully this helps!