Respuesta :

the measure of angle x is 42 degreees.
Since all Triangles have an Interior sum of 180°, you need to do this:
1.) Add the two angles you already have: 
[tex]90 48=138[/tex]
2.) Subtract the sum from 180°: [tex]180-138=42[/tex]
Final Answer: [tex]x=42[/tex]°
Hope this helps!!