Question

I NEED HELP RIGHT NOW!!!! The picture is my question.

Answer 1

`Answer: \\ \frac{x}{ \sqrt{ {(x + 6)}^(2) - {x}^(2) } } = \frac{ \sqrt{ {(x + 6)}^(2) - {x}^(2) } }{13} \\ \Leftrightarrow 13x = {(x + 6)}^(2) - {x}^(2) \\ \Leftrightarrow 13x = {x}^(2) + 12x + 36 - {x}^(2) \\ \Leftrightarrow x = 36`