what is the value of x to the nearest tenth

You will have to use trig to solve this:
The side you have is adjacent to the known angle
The side you are looking for is opposite the known angle
^^^This means you need to use tan:
tan(24) = [tex]\frac{x}{12}[/tex]
.445222 = [tex]\frac{x}{12}[/tex]
^^^input tan(24) into calculator, then multiply 12 to both sides to isolate and solve for x
5.3 ≈ x
Hope this helped!