Question

Please help me, I’m very confused

Answer 1

Answer:

Step-by-Step:
(This is a right angle which = 90°)

Set an equation up:
(x-4)+(2(x+6)) = 90
x-4+2x+12 = 90
3x+8 = 90
3x=82
x = 27.3333333333
x= 27.33