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

Answer:
[tex]x = 3 \sqrt{2} [/tex]
Step-by-step explanation:
[tex]x \cos(45) = 3 \\ x \times \frac{1} { \sqrt{2} } = 3 \\ x = 3 \sqrt{2 } \\ x = 4.24[/tex]