Explanation:
[tex] \sqrt{13} + \sqrt{13} + \sqrt{} x = 180[/tex]
[tex]2 \sqrt{13} + \sqrt{} x = 180[/tex]
[tex] \sqrt{} x = 180 - 2 \sqrt{13} [/tex]
[tex] \sqrt{x} = 172.7888974[/tex]
[tex] \sqrt{ {x}^{2} } = \sqrt{172.7888974} [/tex]
[tex]x = 13.14491907[/tex]
