Find the length of side x in simplest radical form with a rational denominator.

[tex]x = \frac{7 \sqrt{3} }{2} \\ [/tex]
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[tex] \frac{7}{x} = \frac{2}{ \sqrt{3} } \\ [/tex]
[tex]7 \times \sqrt{3} = 2 \times x[/tex]
[tex]7 \sqrt{3} = 2x[/tex]
[tex] \frac{7 \sqrt{3} }{2} = x \\ [/tex]
[tex]x = \frac{7 \sqrt{3} }{2} \\ [/tex]
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