Use the Law of Cosines:

For any ΔABC, a² = b² + c² ≈ 2bc · cos(A).

x ≈ 33.752

Use the Law of Sines:

For any ΔABC,

$\frac{\sin A}{a} = \frac{\sin C}{b} = \frac{\sin C}{c} .$

x ≈ 9.663