Compute angle x, in degrees.
A right angle is 90 degrees:
Our equation will be 8X + 5 + 3X + 8 = 90. We can simplify this equation to get 8X = 77. So we divide 8 from 77 to get 9.625. So X = 9.625 degrees
8x + 5 + 3x + 8 = 90
11x + 13 = 90
11x = 77
x = 7 degrees
+137 
